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fx-82ES PLUS
fx-85ES PLUS
fx-95ES PLUS
fx-350ES PLUS
EN
(2nd edition / NATURAL-V.P.A.M.)
User’s Guide
CASIO Worldwide Education Website
https://edu.casio.com
Manuals are available in multi languages at
https://world.casio.com/manual/calc/
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Table of Contents
Before Using the Calculator....................................................
About this Manual.................................................................................... 4
Initializing the Calculator..........................................................................4
Precautions..............................................................................................4
Safety Precautions..........................................................................................4
Handling Precautions......................................................................................5
Getting Started.........................................................................................5
Removing the Hard Case................................................................................5
Turning Power On and Off.............................................................................. 6
Adjusting Display Contrast..............................................................................6
Key Markings.................................................................................................. 6
Reading the Display........................................................................................7
Using Menus................................................................................................... 9
Calculation Modes and Calculator Setup.............................10
Calculation Mode................................................................................... 10
Configuring the Calculator Setup........................................................... 11
Initializing Calculator Settings....................................................................... 15
4
Inputting Expressions and Values........................................17
Basic Input Rules...................................................................................17
Inputting with Natural Display................................................................ 18
Form Calculation Range.................................................................... 18
√
Using V
Overwrite Input Mode (Linear Display only)...........................................20
Correcting and Clearing an Expression................................................. 20
alues and Expressions as Arguments (Natural Display only)....19
Basic Calculations..................................................................21
Toggling Calculation Results..................................................................21
Fraction Calculations............................................................................. 22
Percent Calculations..............................................................................23
Degree, Minute, Second (Sexagesimal) Calculations............................23
Multi-Statements....................................................................................24
Using Engineering Notation................................................................... 24
Prime Factorization................................................................................25
Calculation History and Replay..............................................................26
Calculation History........................................................................................ 26
Replay...........................................................................................................26
Using Memory Functions....................................................................... 26
Answer Memory (Ans)...................................................................................26
Variables (A, B, C, D, E, F, M, X, Y).............................................................. 27
Independent Memory (M)..............................................................................28
Clearing the Contents of All Memories..........................................................28
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Function Calculations............................................................29
Pi (π), Natural Logarithm Base e............................................................
29
Trigonometric Functions........................................................................ 29
Hyperbolic Functions............................................................................. 29
Angle Unit Conversion........................................................................... 30
Exponential Functions............................................................................30
Logarithmic Functions............................................................................30
Power Functions and Power Root Functions.........................................31
Rectangular-Polar Coordinate Conversion............................................ 32
Factorial Function (!)..............................................................................33
Absolute Value Function (Abs)...............................................................33
Random Number (Ran#)........................................................................34
Random Integer (RanInt#)..................................................................... 34
Permutation (nPr) and Combination (nCr)............................................. 34
Rounding Function (Rnd).......................................................................35
Using Calculation Modes.......................................................36
Statistical Calculations (STAT)...............................................................36
Inputting Data................................................................................................37
Statistics Calculation Screen.........................................................................38
Using the Statistics Menu..............................................................................38
Calculating Estimated Values........................................................................43
Equation Calculations (EQN) (fx-95ES PLUS only)...............................44
Changing the Current Equation Type Setting................................................45
EQN Mode Calculation Examples.................................................................45
Creating a Numerical Table from a Function (TABLE)...........................46
Inequality Calculations (INEQ) (fx-95ES PLUS only).............................48
Changing the Inequality Type........................................................................49
INEQ Mode Calculation Examples................................................................49
Special Solution Display................................................................................50
Ratio Calculations (RATIO) (fx-95ES PLUS only)..................................51
Changing the Ratio Expression Type............................................................52
RATIO Mode Calculation Example................................................................52
Technical Information............................................................ 53
Errors..................................................................................................... 53
Displaying the Location of an Error...............................................................53
Clearing the Error Message.......................................................................... 53
Error Messages.............................................................................................53
Before Assuming Malfunction of the Calculator... ............................... 55
Replacing the Battery.............................................................................55
Calculation Priority Sequence................................................................56
Calculation Ranges, Number of Digits, and Precision........................... 57
Calculation Range and Precision..................................................................57
Function Calculation Input Ranges and Precision........................................ 57
Specifications.........................................................................................60
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Verifying the Authenticity of Your Calculator.......................................... 61
Frequently Asked Questions.................................................
Frequently Asked Questions..................................................................62
62
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Before Using the Calculator
About this Manual
• In no event shall CASIO Computer Co., Ltd. be liable to anyone for
special, collateral, incidental, or consequential damages in connection
with or arising out of the purchase or use of this product and items that
come with it.
• Moreover, CASIO Computer Co., Ltd. shall not be liable for any claim of
any kind whatsoever by any other party arising out of the use of this
product and the items that come with it.
• Unless specifically stated, all sample operations in this manual assume
that the calculator is in its initial default setup. Use the procedure under
"Initializing the Calculator" to return the calculator to its initial default
setup.
• The contents of this manual are subject to change without notice.
• The displays and illustrations (such as key markings) shown in this
manual are for illustrative purposes only
the actual items they represent.
• QR Code is a registered trademark of DENSO WAVE INCORPORATED
in Japan and in other countries.
• Company and product names used in this manual may be registered
trademarks or trademarks of their respective owners.
, and may differ somewhat from
Initializing the Calculator
Perform the following procedure when you want to initialize the calculator
and return the calculation mode and setup to their initial default settings.
Note that this operation also clears all data currently in calculator memory
(CLR) (All) (Yes)
Precautions
Be sure to read the following safety precautions before using the
calculator
Safety Precautions
• Keep batteries out of the reach of small children.
.
Battery
.
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• Use only the type of battery specified for this calculator in this
manual.
Handling Precautions
• Even if the calculator is operating normally, replace the battery
according to the schedule shown below
specified number of years may result in abnormal operation. Replace
the battery immediately after display figures become dim.
fx-82ES PLUS/fx-95ES PLUS: Every 2 years
fx-85ES PLUS/fx-350ES PLUS: Every 3 years
• A dead battery can leak, causing damage to and malfunction of the
calculator. Never leave a dead battery in the calculator.
• The battery that comes with the calculator is for factory testing,
and it discharges slightly during shipment and storage. Because of
these reasons, its battery life may be shorter than normal.
• Do not use a nickel-based primary battery with this product.
Incompatibility between such batteries and product specifications can
result in shorter battery life and product malfunction.
• Avoid use and storage of the calculator in areas subjected to
temperature extremes, and large amounts of humidity and dust.
• Do not subject the calculator to excessive impact, pressure, or bending.
• Never try to take the calculator apart.
• Use a soft, dry cloth to clean the exterior of the calculator.
• Whenever discarding the calculator or batteries, be sure to do so in
accordance with the laws and regulations in your particular area.
. Continued use after the
Getting Started
Removing the Hard Case
Before using the calculator
and then affix the hard case to the back of the calculator as shown in the
illustration below.
, slide its hard case downwards to remove it,
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Turning Power On and Off
• Press to turn on the calculator.
• Press (OFF) to turn off the calculator.
Note
• The calculator also will turn off automatically after approximately 10 minutes of nonuse. Press the key to turn the calculator back on.
Adjusting Display Contrast
1. fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS: Press
( CONT ).
fx-95ES PLUS: Press (SETUP) ( CONT ).
2. Use and to adjust display contrast.
3. After the setting is the way you want, press .
Important!
• If adjusting display contrast does not improve display readability, it probably means
that battery power is low
. Replace the battery.
Key Markings
Pressing the
alternate function of the second key
the text printed above the key.
or key followed by a second key performs the
. The alternate function is indicated by
(SETUP)
(1) Keycap function (2) Alternate function
• The following shows an example of how an alternate function operation
is represented in this manual.
Example: (sin-1)* 1
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* Indicates the function that is accessed by the key operation (
) before it. Note that this is not part of the actual key operation
you perform.
• The following shows an example of how a key operation to select an onscreen menu item is represented in this manual.
Example: (COMP)
* Indicates the menu item that is selected by the number key
operation ( ) before it. Note that this is not part of the actual key
operation you perform.
• The cursor key is marked with four arrows, indicating direction, as
shown in the illustration nearby
indicated as
, , , and .
*
. In this manual, cursor key operation is
Reading the Display
The two-line display makes it possible to view both the input expression
and its result at the same time.
(1) Input expression
(2) Calculation result
(3) Indicators
• If a indicator appears on the right side of the calculation result, it
means the displayed calculation result continues to the right. Use
and to scroll the calculation result display.
• If a indicator appears on the right side of the input expression, it
means the displayed calculation continues to the right. Use and
to scroll the input expression display. Note that if you want to scroll the
input expression while both the and indicators are displayed, you
will need to press first and then use and to scroll.
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Display indicators
This indicator: Means this:
The keypad has been shifted by pressing the
key. The keypad will unshift and this indicator will
disappear when you press a key
The alpha input mode has been entered by
pressing the key. The alpha input mode will
be exited and this indicator will disappear when
you press a key
M There is a value stored in independent memory.
The calculator is standing by for input of a variable
STO
RCL
STAT The calculator is in the STAT Mode.
name to assign a value to the variable. This
indicator appears after you press
The calculator is standing by for input of a variable
name to recall the variable's value. This indicator
appears after you press .
.
.
(STO).
The default angle unit is degrees.
The default angle unit is radians.
The default angle unit is grads.
FIX A fixed number of decimal places is in effect.
SCI A fixed number of significant digits is in effect.
Math Natural Display is selected as the display format.
Calculation history memory data is available and
can be replayed, or there is more data above/
below the current screen.
Disp
The display currently shows an intermediate result
of a multi-statement calculation.
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Important!
• For some type of calculation that takes a long time to execute, the display may show
only the above indicators (without any value) while it performs the calculation
internally
.
Using Menus
Some of the calculator's operations are performed using menus. Pressing
or , for example, will display a menu of applicable functions.
The following are the operations you should use to navigate between
menus.
• You can select a menu item by pressing the number key that
corresponds to the number to its left on the menu screen.
• The indicator in the upper right corner of a menu means there is
another menu below the current one. The indicator means another
menu above. Use and to switch between menus.
• To close a menu without selecting anything, press .
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Calculation Modes and Calculator Setup
Calculation Mode
Before starting a calculation, you must first enter the correct mode as
indicated in the table below
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS
.
When you want to perform this type of
operation:
General calculations
Statistical and regression calculations (STAT)
Generation of a numerical table based on an
expression
fx-95ES PLUS
When you want to perform this type of
operation:
General calculations (COMP)
Statistical and regression calculations (STAT)
Perform this key
operation:
(COMP)
(TABLE)
Perform this key
operation:
Equation solution (EQN)
Generation of a numerical table based on an
expression
Inequality solution (INEQ)
Ratio calculations (RATIO)
Note
• The initial default calculation mode is the COMP Mode.
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(TABLE)
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Configuring the Calculator Setup
Pressing (SETUP) displays the setup menu, which you can use to
control how the calculations are executed and displayed. The setup menu
has two screens, which you can jump between using and .
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS
fx-95ES PLUS
Underlined ( ___ ) settings are initial defaults.
Specifying the Display Format
To specify this
display format:
Natural Display
(MthIO-MathO)
Natural Display
(MthIO-LineO)
Linear Display
(LineIO)
Natural Display (MthIO-MathO, MthIO-LineO) causes fractions, irrational
numbers, and other expressions to be displayed as they are written on
paper
MthIO-MathO displays input and calculation results using the same format
as they are written on paper.
MthIO-LineO displays input the same way as MthIO-MathO, but
calculation results are displayed in linear format.
Linear Display (LineIO) causes fractions and other expressions to be
displayed in a single line.
.
Perform this key operation:
(SETUP) (MthIO) (MathO)
(SETUP) (MthIO) (LineO)
(SETUP) (LineIO)
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Examples:
MthIO-MathO
MthIO-LineO
(Number Format: Norm 1)
MthIO-LineO
(Number Format: Norm 2)
LineIO
(Number Format: Norm 1)
Note
• The calculator switches to Linear Display automatically whenever you enter the STAT
Mode.
Specifying the Default Angle Unit
To specify this as the
Perform this key operation:
default angle unit:
Degrees (SETUP) (Deg)
Radians (SETUP) (Rad)
Grads (SETUP) (Gra)
90°= π/2 radians = 100 grads
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Specifying the Number Format
Specifies the number of digits for display of a calculation result.
To specify this: Perform this key operation:
Number of Decimal
(SETUP) (Fix) -
Places
Number of Significant
(SETUP) (Sci) -
Digits
Exponential Display
Range
(SETUP) (Norm) (Norm 1) or
(Norm 2)
Fix: The value you specify (from 0 to 9) controls the number of decimal
places for displayed calculation results. Calculation results are rounded of
to the specified digit before being displayed.
Example: (LineIO) 100 ÷ 7 = 14.286 (Fix 3)
14.29 (Fix 2)
Sci: The value you specify (from 0 to 9) controls the number of significant
digits for displayed calculation results. Calculation results are rounded off
to the specified digit before being displayed.
Example: (LineIO) 1 ÷ 7 = 1.4286 × 10-1 (Sci 5)
1.429 × 10-1 (Sci 4)
1.428571429 × 10-1 (Sci 0)
Norm: Selecting one of the two available settings (Norm 1, Norm 2)
determines the range in which results will be displayed in exponential
format. Outside the specified range, results are displayed using non-
exponential format.
Norm 1: 10-2 > |x|, |x| ≧ 10
Norm 2: 10-9 > |x|, |x| ≧ 10
10
10
Example: (LineIO) 1 ÷ 200 = 5 × 10-3 (Norm 1)
0.005 (Norm 2)
f
Specifying the Fraction Display Format
To specify this
fraction display
Perform this key operation:
format:
Mixed
(SETUP) (ab/c)
Improper (SETUP) (d/c)
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Specifying the Complex Number Format (fx-95ES PLUS only)
To specify this
complex number
format:
Rectangular
Coordinates
Polar Coordinates
Specifying the Stat Format
Specifies whether or not to display a FREQ (frequency) column in the
STAT Mode Statistics Editor.
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS
To specify this: Perform this key operation:
Show FREQ Column (SETUP) (STAT) (ON)
Perform this key operation:
(SETUP) (CMPLX) (a+bi)
(SETUP) (CMPLX) (r∠θ)
Hide FREQ Column (SETUP) (STAT) (OFF)
fx-95ES PLUS
To specify this: Perform this key operation:
Show FREQ Column (SETUP) (STAT) (ON)
Hide FREQ Column (SETUP) (STAT) (OFF)
Specifying the Decimal Point Display Format
Specifies whether to display a dot or a comma for the calculation result
decimal point. A dot is always displayed during input.
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS
To specify this
decimal point
display format:
Dot (.) (SETUP) (Disp) (Dot)
Perform this key operation:
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Comma (,) (SETUP) (Disp) (Comma)
fx-95ES PLUS
To specify this
decimal point
Perform this key operation:
display format:
Dot (.) (SETUP) (Disp) (Dot)
Comma (,) (SETUP) (Disp) (Comma)
Note
• When dot is selected as the decimal point, the separator for multiple results is a
comma (,). When comma is selected, the separator is a semicolon (;).
Adjusting Display Contrast
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS:
(SETUP)
( CONT )
fx-95ES PLUS: (SETUP) ( CONT )
See "Getting Started" for details.
Initializing Calculator Settings
Perform the following procedure to initialize the calculator
the calculation mode to COMP and returns all other settings, including
setup menu settings, to their initial defaults.
(CLR) (Setup) (Yes)
This setting: Is initialized to this:
Calculation Mode COMP
Display Format MthIO-MathO
Angle Unit Deg
Number Format Norm 1
Fraction Display
d/c
Format
, which returns
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Complex Number
Format (fx-95ES
PLUS only)
Stat Format OFF
Decimal Point Dot
a+bi
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Inputting Expressions and
alues
V
Basic Input Rules
Calculations can be input in the same form as they are written. When you
press
automatically and the result will appear on the display
Example 1: 4 × sin30 × (30 + 10 × 3) = 120
the priority sequence of the input calculation will be evaluated
.
*1 Input of the closing parenthesis is required for sin, sinh, and other
functions that include parentheses.
*2 These multiplication symbols (×) can be omitted. A multiplication
symbol can be omitted when it occurs immediately before an opening
parenthesis, immediately before sin or other function that includes
parentheses, immediately before the Ran# (random number) function,
or immediately before a variable (A, B, C, D, E, F
constants, π or e.
*3 The closing parenthesis immediately before the
omitted.
Example 2: Input example omitting
above example.
4 30 30 10 3
*2
and
, M, X, Y), scientific
operation can be
*3
operations in the
Note
• If the calculation becomes longer than the screen width during input, the screen will
scroll automatically to the right and the
this happens, you can scroll back to the left by using and to move the cursor.
• When Linear Display is selected, pressing will cause the cursor to jump to the
beginning of the calculation, while will jump to the end.
indicator will appear on the display. When
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• When Natural Display is selected, pressing while the cursor is at the end of the
input calculation will cause it to jump to the beginning, while pressing while the
cursor is at the beginning will cause it to jump to the end.
• You can input up to 99 bytes for a calculation. Each numeral, symbol, or function
normally uses one byte. Some functions require three to 13 bytes.
• The cursor will change shape to when there are 10 bytes or less of allowed input
remaining. If this happens, end calculation input and then press .
Inputting with Natural Display
Selecting Natural Display makes it possible to input and display fractions
and certain functions (log, , , , , , , , , , Abs) just
as they are written in your textbook.
Example:
(MthIO-MathO)
1 + √2
2 2 1 2
Important!
• Certain types of expressions can cause the height of an input expression to be greater
than one display line. The maximum allowable height of an input expression is two
display screens (31 dots × 2). Further input will become impossible if the height of the
calculation you are inputting exceeds the allowable limit.
• Nesting of functions and parentheses is allowed. Further input will become impossible
if you nest too many functions and/or parentheses. If this happens, divide the
calculation into multiple parts and calculate each part separately.
Note
2 + √2
• When you press and obtain a calculation result using Natural Display, part of the
expression you input may be cut off. If you need to view the entire input expression
again, press and then use and to scroll the input expression.
√ Form Calculation Range
Results that include square root symbols can have up to two terms (an
integer term is also counted as a term).
a√b
When a calculation result takes the form ±
±
c
results are displayed using formats like those shown below.
18
*
d√e
, √ form calculation
f
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± a√b, ± d ± a√b,
*
The ranges of the coefficients (a, b, c, d, e, f) are as shown below
1 ≦ a < 100, 1 < b < 1000, 1 ≦ c < 100
0 ≦ d < 100, 0 ≦ e < 1000, 1 ≦ f < 100
(a, b, c, d, e, f are integers)
Example:
10√2 + 15 × 3√3 = 45√3 + 10√2 √ form
99√999 = 3129.089165 (= 297√111) decimal form
± a'√b ± d'√e
c'
.
Using Values and Expressions as Arguments (Natural Display only)
A value or an expression that you have already input can be used as the
argument of a function. After you have input
make it the argument of √ , resulting in
Example: T
As shown above, the value or expression to the right of the cursor after
specified next. The range encompassed as the argument is everything up
to the first open parenthesis to the right, if there is one, or everything up to
the first function to the right (sin(30), log2(4), etc.)
This capability can be used with the following functions: ,
( ), , ( ), ( ), ( ), , ,
( ), .
o input 1 +
(INS) are pressed becomes the argument of the function that is
7
and then change it to 1 +
6
√
1
7
, for example, you can
6
7
.
6
7
(MthIO-MathO)
√
6
7 6
(INS)
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Overwrite Input Mode (Linear Display only)
Y
ou can select either insert or overwrite as the input mode, but only while
Linear Display is selected. In the overwrite mode, text you input replaces
the text at the current cursor location. You can toggle between the insert
and overwrite modes by performing the operations:
cursor appears as " " in the insert mode and as " " in the overwrite
mode.
Note
• Natural Display always uses the insert mode, so changing display format from Linear
Display to Natural Display will automatically switch to the insert mode.
(INS). The
Correcting and Clearing an Expression
o delete a single character or function:
T
Move the cursor so it is directly to the right of the character or function you
want to delete, and then press
In the overwrite mode, move the cursor so it is directly under the character
or function you want to delete, and then press .
T
o insert a character or function into a calculation:
Use
insert the character or function and then input it. Be sure always to use the
insert mode if Linear Display is selected.
T
o clear all of the calculation you are inputting:
Press
and to move the cursor to the location where you want to
.
.
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Basic Calculations
Use the
basic calculations.
key to enter the COMP Mode when you want to perform
(COMP)
Toggling Calculation Results
While Natural Display is selected, each press of will toggle the
currently displayed calculation result between its fraction form and decimal
form, its √ form and decimal form, or its π form and decimal form.
Example 1: π ÷ 6 =
1
π = 0.5235987756 (MthIO-MathO)
6
1
(π) 6
Example 2: (√2 + 2) × √3 = √6 + 2√3 = 5.913591358 (MthIO-MathO)
2 2 3
While Linear Display is selected, each press of will toggle the
currently displayed calculation result between its decimal form and fraction
form.
Example 3: 1 ÷ 5 = 0.2 =
4
Example 4: 1 -
1
=
5
5
1
(LineIO)
5
= 0.2 (LineIO)
1 5
π 0.5235987756
6
√6 + 2√3 5.913591358
0.2 1 5
1 4 5
21
1 5 0.2
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Important!
• Depending on the type of calculation result that is on the display when you press the
key, the conversion process may take some time to perform.
• With certain calculation results, pressing the key will not convert the displayed
value.
• You cannot switch from decimal form to mixed fraction form if the total number of digits
used in the mixed fraction (including integer
symbols) is greater than 10.
Note
• With Natural Display (MathO), inputting one of the following calculations and then
pressing
calculation that results in a √ form or π form expression, a division calculation.
Pressing after that will switch to the fraction form or π form of the calculation
result. The √ form of the result will not appear in this case.
instead of will display the calculation result in decimal form: a
, numerator, denominator, and separator
Fraction Calculations
Note that the input method for fractions is dif
ferent, depending upon
whether you are using Natural Display or Linear Display.
2
1
Example 1:
+
3
7
=
2
6
(MthIO-MathO) 2 3 1 2
or 2 3 1 2
(LineIO) 2 3 1 2 7 6
1
Example 2: 4 - 3
1
=
2
2
(MthIO-MathO) 4 ( ) 3 1 2
7
6
7
6
1
2
(LineIO) 4 3 1 2 1 2
Note
• Mixing fractions and decimal values in a calculation while Linear Display is selected
will cause the result to be displayed as a decimal value.
• Results of calculations that mix fraction and decimal values are always decimal.
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• Fractions in calculation results are displayed after being reduced to their lowest terms.
o switch a calculation result between improper fraction and mixed
T
fraction form:
Perform the following key operation:
T
o switch a calculation result between fraction and decimal form:
Press
.
(a
bcd
)
c
Percent Calculations
Inputting a value and pressing (%) causes the input value to
become a percent.
Example 1:
Example 2:
Example 3:
Example 4:
150 × 20% = 30
150
Calculate what percentage of 880 is 660 (75%)
660
Increase 2500 by 15% (2875)
2500
Decrease 3500 by 25% (2625)
3500
2500 15 (%) 2875
3500 25 (%) 2625
20 (%) 30
880 (%) 75
Degree, Minute, Second (Sexagesimal) Calculations
Y
ou can perform calculations using sexagesimal values, and convert
values between sexagesimal and decimal.
Performing an addition or subtraction operation between sexagesimal
values, or a multiplication or division operation between a sexagesimal
value and a decimal value will cause the result to be displayed as a
sexagesimal value.
You also can convert between sexagesimal and decimal.
The following is the input format for a sexagesimal value: {degrees}
{minutes} {seconds} .
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Note
• You must always input something for the degrees and minutes, even if they are zero.
Example 1:
2
Example 2:
2°20’30” + 39’30” = 3°00’00”
20 30 0 39 30 3°0’0”
Convert 2°15’18” to its decimal equivalent.
15 18 2°15’18”
2
(Converts sexagesimal to decimal.) 2.255
(Converts decimal to sexagesimal.) 2°15’18”
Multi-Statements
Y
ou can use the colon character (:) to connect two or more expressions
and execute them in sequence from left to right when you press
Example: 3 + 3 : 3 × 3
3 3 (:) 3 3 6
.
Using Engineering Notation
A simple key operation transforms a displayed value to engineering
notation.
Example 1:
decimal point to the right.
Example 2: T
decimal point to the left.
Transform the value 1234 to engineering notation, shifting the
1234
1.234×10
1234×10
ransform the value 123 to engineering notation, shifting the
9
1234
3
0
24
123
(←) 0.123×10
123
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(←) 0.000123×10
Prime Factorization
In the COMP Mode, a positive integer no more than 10 digits long can be
factored to prime factors.
6
Example 1: T
o perform prime factorization on 1014
1014
1014
(FACT)
When you perform prime factorization on a value that includes a factor that
is prime number with more than three digits, the part that cannot be
factored will be enclosed in parentheses on the display
.
Example 2: To perform prime factorization on 4104676 (= 22 × 10132)
4104676
4104676
(FACT)
Any one of the following operations will exit prime factorization result
display
.
- Pressing
(FACT) or .
- Pressing any of the following keys: or .
- Using the setup menu to change the angle unit setting (Deg, Rad, Gra)
or the display digits setting (Fix, Sci, Norm).
Note
• You will not be able to execute prime factorization while a decimal value, fraction, or
negative value calculation result is displayed. T
(Math ERROR).
• You will not be able to execute prime factorization while the result of a calculation that
uses Pol, Rec is displayed.
rying to do so will cause a math error
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Calculation History and Replay
Calculation History
In the COMP Mode, the calculator remembers up to approximately 200
bytes of data for the newest calculation.
Y
ou can scroll through calculation history contents using
Example:
and .
1 + 1 = 2
2 + 2 = 4
3 + 3 = 6
(Scrolls back.) 4
(Scrolls back again.) 2
Note
• Calculation history data is all cleared whenever you press
ferent calculation mode, when you change the display format, or whenever you
dif
perform the following operations:
(CLR) (All) (Yes).
1 1 2
2 2 4
3 3 6
, when you change to a
(CLR) (Setup) (Yes),
Replay
While a calculation result is on the display
edit the expression you used for the previous calculation.
, you can press
or to
Example: 4 × 3 + 2 = 14
4 × 3 - 7 = 5
4 3 2 14
(Continuing) 7 5
Using Memory Functions
Answer Memory (Ans)
The last calculation result obtained is stored in Ans (answer) memory.
Ans memory contents are updated whenever a new calculation result is
displayed.
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Answer Memory contents are updated whenever you execute a calculation
using any one of the following keys: , , , (M-), ,
(STO).
Answer Memory can hold up to 15 digits.
Example 1: T
Example 2: T
o divide the result of 3 × 4 by 30 (LineIO)
4 12
3
(Continuing) 30
o perform the calculations shown below:
123 456 579
(Continuing) 789
Variables (A, B, C, D, E, F, M, X, Y)
Your calculator has nine preset variables named A, B, C, D, E, F, M, X,
and Y.
You can assign values to variables and use the variables in calculations.
Example:
To assign the result of 3 + 5 to variable A
3 5 (STO) (A) 8
To multiply the contents of variable A by 10
(Continuing) (A) 10 80
To recall the contents of variable A
(Continuing) (A) 8
To clear the contents of variable A
0 (STO) (A) 0
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Independent Memory (M)
Y
ou can add calculation results to or subtract results from independent
memory.
The "M" indicator appears on the display when there is any value other
than zero stored in independent memory.
Example:
To clear the contents of M
0
To add the result of 10 × 5 to M
(Continuing) 10 5 50
To subtract the result of 10 + 5 from M
(Continuing) 10 5 (M-) 15
To recall the contents of M
(Continuing) (M) 35
Note
• Variable M is used for independent memory.
(STO) (M) 0
Clearing the Contents of All Memories
Ans memory
even if you press
calculator
Perform the following procedure when you want to clear the contents of all
memories.
, independent memory, and variable contents are retained
, change the calculation mode, or turn off the
.
(CLR) (Memory) (Yes)
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Function Calculations
Use the
function calculations.
Note: Using functions can slow down a calculation, which may delay
display of the result. Do not perform any subsequent operation while
waiting for the calculation result to appear
calculation before its result appears, press
key to enter the COMP Mode when you want to perform
(COMP)
. To interrupt an ongoing
.
Pi (π), Natural Logarithm Base e
π is displayed as 3.141592654, but π = 3.14159265358980 is used for
internal calculations.
e is displayed as 2.718281828, but e
internal calculations.
= 2.71828182845904 is used for
Trigonometric Functions
Specify the angle unit before performing calculations.
Example 1: sin 30° = 0.5 (LineIO) (Angle unit: Deg)
30 0.5
Example 2: sin-1 0.5 = 30° (LineIO) (Angle unit: Deg)
(sin-1) 0 5 30
Hyperbolic Functions
Input a function from the menu that appears when you press .
The angle unit setting does not af
fect calculations.
Example 1: sinh 1 = 1.175201194
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(sinh) 1 1.175201194
Example 2: cosh-1 1 = 0
(cosh-1) 1 0
Angle Unit Conversion
°, r, g : These functions specify the angle unit. ° specifies degrees,
radians, and g grads.
Input a function from the menu that appears when you perform the
following key operation: (DRG ).
Example: π/2 radians = 90°, 50 grads = 45° (Angle unit: Deg)
(π) 2 (DRG ) (r)
50
(DRG ) (g) 45
Exponential Functions
Note that the input method is dif
using Natural Display or Linear Display.
Example: To calculate e5 × 2 to three significant digits (Sci 3)
ferent depending upon whether you are
(SETUP) (Sci)
r
90
(MthlO-MathO) ( ) 5 2 2.97×10
(LinelO) ( ) 5 2 2.97×10
Logarithmic Functions
Use the key to input logab as log (a,b).
Base 10 is the default setting if you do not input anything for a.
The
selected. In this case, you must input a value for the base.
Example 1: log10 1000 = log 1000 = 3
Example 2:
key also can be used for input, but only while Natural Display is
1000 3
log2 16 = 4
2
2
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2 (,) 16 4
(MthIO-MathO, MthIO-LineO) 2 16 4
Example 3: log2(43) = 6 (MthIO-MathO, MthIO-LineO)
2 6
Example 4: log2(4)3 = 8 (MthIO-MathO, MthIO-LineO)
2 4 8
Example 5: T
o calculate ln 90 (= loge 90) to three significant digits (Sci 3)
(SETUP) (Sci)
90
4.50×10
Power Functions and Power Root Functions
Note that the input methods for , , , and are different
depending upon whether you are using Natural Display or Linear Display
Example 1: 1.2 × 103 = 1200 (MthIO-MathO)
2 10 3 1200
1
Example 2: (1 + 1)
2+2
= 16 (MthIO-MathO)
0
.
Example 3: (52)3 = 15625
Example 4: 5√32 = 2
(MthlO-MathO) ( ) 5 32 2
(LinelO) 5 ( ) 32 2
Example 5: T
places (Fix 3)
o calculate √
1 1 2 2 16
5 15625
2 × 3 (= 3√2 = 4.242640687...) to three decimal
(SETUP) (Fix)
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(MthIO-MathO) 2 3√2
(LineIO) 2 3 4.243
Example 6: 3√5 + 3√-27 = -1.290024053
4.243
(LineIO) ( ) 5
( ) 27
1
Example 7:
= 12
1
1
-
3
4
(LineIO) 3 4 12
Note
• The following functions cannot be input in consecutive sequence: x2, x3,
input 2 , for example, the final will be ignored. To input 2
press the key, and then press (MthIO-MathO).
Rectangular-Polar Coordinate Conversion
-1.290024053
, x-1. If you
2
2
, input 2 ,
Pol converts rectangular coordinates to polar coordinates, while Rec
converts polar coordinates to rectangular coordinates.
(1) Rectangular Coordinates (Rec)
(2) Polar Coordinates (Pol)
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Specify the angle unit before performing calculations.
The calculation result for r and θ and for x and y are each assigned
respectively to variables X and Y
Calculation result θ is displayed in the range of -180° < θ ≦ 180°.
.
Example 1: To convert rectangular coordinates (√
coordinates (Angle unit: Deg)
(MthIO-MathO)
(Pol) 2 (,) 2
(LineIO)
(Pol) 2 (,) 2
Example 2: T
coordinates (Angle unit: Deg)
(MthIO-MathO)
o convert polar coordinates (√2, 45°) to rectangular
(Rec) 2 (,) 45 X = 1, Y = 1
Factorial Function (!)
2, √2) to polar
r = 2, θ = 45
= 2
r
θ = 45
Example: (5 + 3)! = 40320
5 3 (x!)
Absolute Value Function (Abs)
Note that the input method is dif
using Natural Display or Linear Display.
Example: |2 - 7| × 2 = 10
(MthIO-MathO)
(LineIO)
ferent depending upon whether you are
2 7 2 10
2 7 2 10
40320
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Random Number (Ran#)
Generate three 3-digit random numbers.
The random 3-digit decimal values are converted to 3-digit
integer values by multiplying by 1000.
Function that generates a pseudo random number in the range of 0.000 to
0.999.
The result is displayed as a fraction when Natural Display is selected.
Example:
1000 (Ran#) 634
92
175
(Results shown here are for illustrative purposes only. Actual results will
dif
fer.)
Random Integer (RanInt#)
For input of the function of the form RanInt#(a, b), which generates a
random integer within the range of a to b.
Example:
(Results shown here are for illustrative purposes only. Actual results will
fer.)
dif
To generate random integers in the range of 1 to 6
(RanInt) 1 (,) 6 2
Permutation (nPr) and Combination (nCr)
6
1
Example: To determine the number of permutations and combinations
possible when selecting four people from a group of 10.
Permutations: 10
Combinations: 10 (nCr) 4
(nPr) 4
34
5040
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Rounding Function (Rnd)
The argument of this function is made a decimal value and then rounded
in accordance with the current number of display digits setting (Norm, Fix,
or Sci).
With Norm 1 or Norm 2, the argument is rounded of
With Fix and Sci, the argument is rounded off to the specified digit.
When Fix 3 is the display digits setting, for example, the result of 10 ÷ 3 is
displayed as 3.333, while the calculator maintains a value of
3.33333333333333 (15 digits) internally for calculation.
In the case of Rnd(10÷3) = 3.333 (with Fix 3), both the displayed value
and the calculator’s internal value become 3.333.
Because of this a series of calculations will produce different results
depending on whether Rnd is used (Rnd(10÷3) × 3 = 9.999) or not used
(10 ÷ 3 × 3 = 10.000).
Example: To perform the following calculations when Fix 3 is selected for
the number of display digits: 10 ÷ 3 × 3 and Rnd(10 ÷ 3) × 3 (LineIO)
f to 10 digits.
(SETUP) (Fix)
10 3 3 10.000
(Rnd) 10 3 3 9.999
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Using Calculation Modes
Statistical Calculations (ST
To start a statistical calculation, perform the key operation
to enter the ST
type of calculation you want to perform.
To select this type of statistical calculation:
(Regression formula shown in parentheses)
Single-variable (X) (1-VAR)
Paired-variable (X, Y), linear regression
AT Mode and then use the screen that appears to select the
(y = A + Bx)
AT)
Press this key:
(A+BX)
(STAT)
Paired-variable (X, Y), quadratic regression
(y = A + Bx + Cx2)
Paired-variable (X, Y), logarithmic regression
(y = A + Blnx)
Paired-variable (X, Y), e exponential
regression
(y = A eBx)
Paired-variable (X, Y), ab
regression
Paired-variable (X, Y), power regression
Paired-variable (X, Y), inverse regression
exponential
(y = AB
(y = AxB)
(y = A + B/x)
(_+CX2)
(ln X)
(e∧X)
(A•B∧X)
x
)
(A•X∧B)
(1/X)
Pressing any of the above keys (
to ) displays the Statistics Editor.
36
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Note
• When you want to change the calculation type after entering the STAT Mode, perform
the key operation (STAT) (Type) to display the calculation type selection
screen.
Inputting Data
Use the Statistics Editor to input data. Perform the following key operation
to display the Statistics Editor:
The Statistics Editor provides 80 rows for data input when there is an X
column only
, 40 rows when there are X and FREQ columns or X and Y
columns, or 26 rows when there are X, Y, and FREQ columns.
Note
• Use the FREQ (frequency) column to input the quantity (frequency) of identical data
items. Display of the FREQ column can be turned on (displayed) or of
using the Stat Format setting on the setup menu.
(STAT) (Data).
f (not displayed)
Example 1: To select linear regression and input the following data:
(170, 66), (173, 68), (179, 75)
(STAT) (A+BX)
170 173 179
66 68 75
Important!
• All data currently input in the Statistics Editor is deleted whenever you exit the STAT
Mode, switch between the single-variable and a paired-variable statistical calculation
type, or change the Stat Format setting on the setup menu.
• The following operations are not supported by the Statistics Editor: ,
(M-), (STO). Pol, Rec, and multi-statements also cannot be input with the
Statistics Editor
.
37
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To change the data in a cell:
Single-variable Statistics
Paired-variables Statistics
In the Statistics Editor
you want to change, input the new data, and then press
T
o delete a line:
In the Statistics Editor, move the cursor to the line that you want to delete
and then press
T
o insert a line:
In the Statistics Editor, move the cursor to the location where you want to
insert the line and then perform the following key operation:
(STAT) (Edit) (Ins).
T
o delete all Statistics Editor contents:
In the Statistics Editor, perform the following key operation:
(STAT) (Edit) (Del-A).
, move the cursor to the cell that contains the data
.
.
Statistics Calculation Screen
The Statistics Calculation Screen is for performing statistical calculations
with the data you input with the Statistics Editor
while the Statistics Editor is displayed switches to the Statistics Calculation
Screen.
. Pressing the
key
Using the Statistics Menu
While the Statistics Calculation Screen is on the display
(STAT) to display the Statistics Menu.
The content to the Statistics Menu depends on whether the currently
selected statistical operation type uses a single variable or paired
variables.
, press
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Statistics Menu Items
Common Items
Select this menu
item:
(Type) Display the calculation type selection screen
(Data) Display the Statistics Editor
(Sum)
(Var)
Paired-variable:
(Reg)
When you want to obtain this:
Display the Sum sub-menu of commands for
calculating sums
Display the Var sub-menu of commands for
calculating the mean, standard deviation, etc.
Display the Reg sub-menu of commands for
regression calculations
• For details see "Commands when Linear
Regression Calculation (A+BX) Is Selected"
and "Commands when Quadratic Regression
Calculation (_+CX2) Is Selected".
Single-variable:
(MinMax)
Paired-variable:
(MinMax)
Single-variable (1-VAR) Statistical Calculation Commands
Sum Sub-menu ( (STAT) (Sum))
Select this menu
item:
(∑x2)
(∑x)
Display the MinMax sub-menu of commands
for obtaining maximum and minimum values
When you want to obtain this:
Sum of squares of the sample data
Sum of the sample data
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Var Sub-menu ( (STAT) (Var))
Select this menu
item:
(n)
(x) Mean of the sample data
(σx) Population standard deviation
(sx) Sample standard deviation
MinMax Sub-menu ( (STAT) (MinMax))
Select this menu
item:
(minX) Minimum value
(maxX) Maximum value
When you want to obtain this:
Number of samples
When you want to obtain this:
Commands when Linear Regression Calculation (A+BX) Is Selected
Sum Sub-menu ( (STAT) (Sum))
Select this menu
item:
(∑x2)
(∑x)
(∑y2)
(∑y)
(∑xy)
(∑x3)
(∑x2y)
When you want to obtain this:
Sum of squares of the X-data
Sum of the X-data
Sum of squares of the Y-data
Sum of the Y-data
Sum of products of the X-data and Y-data
Sum of cubes of the X-data
Sum of (X-data squares × Y-data)
(∑x4)
Sum of biquadrate of the X-data
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Var Sub-menu ( (STAT) (Var))
Select this menu
item:
(n)
(x) Mean of the X-data
(σx) Population standard deviation of the X-data
(sx) Sample standard deviation of the X-data
(y) Mean of the Y-data
(σy) Population standard deviation of the Y-data
(sy) Sample standard deviation of the Y-data
Reg Sub-menu ( (STAT) (Reg))
When you want to obtain this:
Number of samples
Select this menu
item:
(A) Regression coefficient constant term A
(B) Regression coefficient B
(r) Correlation coefficient r
(xˆ)
(yˆ)
MinMax Sub-menu (
Select this menu
item:
(minX) Minimum value of the X-data
When you want to obtain this:
Estimated value of X
Estimated value of Y
(STAT) (MinMax))
When you want to obtain this:
(maxX) Maximum value of the X-data
(minY) Minimum value of the Y-data
(maxY) Maximum value of the Y-data
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Commands when Quadratic Regression Calculation (_+CX2) Is
Selected
Reg Sub-menu ( (STAT) (Reg))
Select this menu
When you want to obtain this:
item:
(A) Regression coefficient constant term A
Linear coefficient B of the regression
(B)
coef
ficients
Quadratic coefficient C of the regression
(C)
coef
ficients
(xˆ1) Estimated value of x
(xˆ2) Estimated value of x
1
2
(yˆ) Estimated value of y
Note
• xˆ, xˆ1, xˆ2 and yˆ are not variables. They are commands of the type that take an
argument immediately before them. See "Calculating Estimated Values" for more
information.
Example 2: To input the single-variable data x = {1, 2, 2, 3, 3, 3, 4, 4,
5}, using the FREQ column to specify the number of repeats for each
items ({xn; freqn} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
population standard deviation.
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS:
(SETUP) (STAT) (ON)
fx-95ES PLUS: (SETUP) (STAT)
(ON)
(STAT) (1-VAR)
1 2 3 4 5
1 2 3 2
(STAT) (Var) (x) 3
(STAT) (Var) (σx)
1.154700538
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Results:
Mean: 3, Population Standard Deviation: 1.154700538
Linear Regression Correlation Coefficient: 0.923
Logarithmic Regression Correlation Coef
ficient: 0.998
Logarithmic Regression Formula: y = -3857.984 + 2357.532lnx
Example 3: T
correlation coefficients for the following paired-variable data and determine
the regression formula for the strongest correlation: (x, y) = (20, 3150),
(110, 7310), (200, 8800), (290, 9310). Specify Fix 3 (three decimal places)
for results.
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS:
fx-95ES PLUS: (SETUP) (STAT)
o calculate the linear regression and logarithmic regression
(SETUP) (STAT) (OFF)
(OFF)
(SETUP) (Fix)
(STAT) (A+BX)
20 110 200 290
3150 7310 8800 9310
(STAT) (Reg) (r)
(STAT) (Type) (ln X)
(STAT) (Reg) (r)
0.923
0.998
(STAT) (Reg) (A) -3857.984
(STAT) (Reg) (B) 2357.532
Results:
Calculating Estimated Values
Based on the regression formula obtained by paired-variable statistical
calculation, the estimated value of y can be calculated for a given x-value.
The corresponding x-value (two values, x1 and x2, in the case of quadratic
regression) also can be calculated for a value of y in the regression
formula.
Example 4: T
regression formula produced by logarithmic regression of the data in
Example 3. Specify Fix 3 for the result. (Perform the following operation
after completing the operations in Example 3.)
o determine the estimate value for x when y = -130 in the
130 (STAT) (Reg) (xˆ)
43
4.861
Page 45
Important!
• Regression coefficient, correlation coefficient, and estimated value calculations can
take considerable time when there are a large number of data items.
Equation Calculations (EQN) (fx-95ES PLUS only)
ou can use the following procedure in the EQN Mode to solve
Y
simultaneous linear equations with two or three unknowns, quadratic
equations, and cubic equations.
1. Press
2. On the menu that appears, select an equation type.
To select this
calculation type:
Simultaneous linear
equations with two
unknowns
Simultaneous linear
equations with three
(EQN) to enter the EQN Mode.
Press this key:
(anX + bnY = cn)
(anX + bnY + cnZ = dn)
unknowns
Quadratic equation (aX2 + bX + c = 0)
Cubic equation (aX3 + bX2 + cX + d = 0)
3. Use the Coefficient Editor that appears to input coefficient values.
• To solve 2x2 + x - 3 = 0, for example, press in step 2, and then
input the following for the coef
3 .
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press .
• Pressing will clear all of the coefficients to zero.
ficients (a = 2, b = 1, c = -3): 2
44
1
Page 46
Important!
• The following operations are not supported by the Coefficient Editor: ,
(M-), (STO). Pol, Rec, and multi-statements also cannot be input
with the Coef
ficient Editor.
4. After all the values are the way you want, press
.
• This will display a solution. Each press of will display another
solution. Pressing while the final solution is displayed will return to
the Coef
• You can scroll between the solutions using the
ficient Editor.
and keys.
• To return to the Coefficient Editor while any solution is displayed,
press .
Note
• Even if Natural Display is selected, the solutions of simultaneous linear equations are
not displayed using any form that includes √ .
• Values cannot be converted to engineering notation on the solution screen.
Changing the Current Equation T
Press
(EQN) and then select an equation type from the menu that
ype Setting
appears. Changing the equation type causes the values of all Coef
Editor coefficients to change to zero.
ficient
EQN Mode Calculation Examples
Example 1: x + 2y = 3, 2x + 3y = 4
(EQN) (anX + bnY = cn)
1 2 3
2 3 4
Example 2: x - y + z = 2, x + y - z = 0, -x + y + z = 4
(EQN) (anX + bnY + cnZ = dn)
1 1 1 2
1 1 1 0
1 1 1 4
(X=) -1
(Y=) 2
(X=) 1
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(Y=) 2
(Z=) 3
Example 3: x2 + x +
Example 4: x2 - 2√2x + 2 = 0 (MthIO-MathO)
Example 5: x3 - 2x2 - x + 2 = 0
3
= 0 (MthIO-MathO)
4
(EQN) (aX2 + bX + c = 0)
1 1 3 4
(EQN) (aX2 + bX + c = 0)
1 2 2 2 (X=) √2
(EQN) (aX3 + bX2 + cX + d = 0)
1 2 1 2
(X1=) -
(X2=) -
(X1=) -1
(X2=) 2
(X3=) 1
1
√2
+
-
2
√2
2
i
i
2
1
2
Creating a Numerical Table from a
Function (T
TABLE generates a numerical table for x and f(x) using an input f(x)
function.
Perform the following steps to generate a numerical table.
1. Enter the TABLE Mode.
• On the fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS, press
on the fx-95ES PLUS, press .
2. Input a function in the format f(x), using the X variable.
• Be sure to input the X variable (
numerical table. Any variable other than X is handled as a constant.
• The following cannot be used in the function: Pol, Rec.
ABLE)
(X)) when generating a
,
46
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3. In response to the prompts that appear, input the values you want to
use, pressing after each one.
For this prompt: Input this:
Start? Input the lower limit of X (Default = 1).
Input the upper limit of X (Default =
End?
Step?
• Inputting the Step value and pressing generates and displays the
numerical table in accordance with the parameters you specified.
• Pressing while the numerical table screen is displayed will return
to the function input screen in step 2.
5).
Note: Make sure that the End value is
always greater than the Start value.
Input the increment step (Default = 1).
Note: The Step specifies by how
much the Start value should be
sequentially incremented as the
numerical table is generated. If you
specify Start = 1 and Step = 1, X
sequentially will be assigned the
values 1, 2, 3, 4, and so on to
generate the numerical table until the
End value is reached.
Example: T
the range -1 ≦ x ≦ 1, incremented in steps of 0.5 (MthIO-MathO)
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS:
o generate a numerical table for the functions f(x) = x2 +
(TABLE)
fx-95ES PLUS: (TABLE)
(X) 1 2
1 1 0 5
1
2
for
47
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Note
• You can use the numerical table screen for viewing values only. Table contents
cannot be edited.
• The numerical table generation operation causes the contents of variable X to be
changed.
• The specified Start, End, and Step values should produce a maximum of 30 Xvalues for the numerical table being generated. Executing a numerical table
generation using a Start, End, and Step value combination that produces more than
30 X-values causes an error
Important!
• The function you input for numerical table generation is deleted whenever you
display the setup menu in the TABLE Mode and switch between Natural Display
and Linear Display.
.
Inequality Calculations (INEQ) (fx-95ES PLUS only)
You can use the following procedure to solve a quadratic inequality or
cubic inequality.
1. Press
2. On the menu that appears, select an inequality type.
To select this inequality
type:
Quadratic inequality (aX2 + bX + c)
(INEQ) to enter the INEQ Mode.
Press this key:
Cubic inequality (aX3 + bX2 + cX + d)
3. On the menu that appears, use keys through to select the
inequality symbol type and orientation.
4. Use the Coef
ficient Editor that appears to input coefficient values.
• To solve x2 + 2x - 3 < 0, for example, input the coefficients a = 1, b = 2,
c = -3 by pressing 1
2 3 .
48
Page 50
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press .
• Pressing will clear all of the coefficients to zero.
Note:The following operations are not supported by the Coef
Editor:
also cannot be input with the Coef
5. After all the values are the way you want, press
• This will display the solutions.
• To return to the Coefficient Editor while the solutions are displayed,
press .
Note
• Values cannot be converted to engineering notation on the solution screen.
, (M-), (STO). Pol, Rec, and multi-statements
ficient Editor.
.
ficient
Changing the Inequality T
Press
that appears. Changing the inequality type causes the values of all
Coef
ficient Editor coefficients to change to zero.
(INEQ) and then select an inequality type from the menu
ype
INEQ Mode Calculation Examples
Example 1: x2 + 2x - 3 < 0 (MthIO-MathO)
(INEQ) (aX2 + bX + c)
(aX2 + bX + c < 0)
Example 2: x2 + 2x
1 2 3
- 3 ≧ 0 (MthIO-MathO)
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(INEQ) (aX2 + bX + c)
(aX2 + bX + c ≧ 0)
1 2 3
Note: Solutions are displayed as shown here
when Linear Display is selected.
Example 3: 2x3 - 3x2 ≧ 0 (MthIO-MathO)
(INEQ) (aX3 + bX2 + cX + d)
(aX3 + bX2 + cX + d ≧ 0)
2 3
Example 4: 3x3 + 3x2 - x
(INEQ) (aX3 + bX2 + cX + d)
Note: Solutions are displayed as shown here
when Linear Display is selected.
> 0 (MthIO-MathO)
(aX3 + bX2 + cX + d > 0)
3 3 1
Special Solution Display
• "All Real Numbers" appears on the solution screen when the solution of
an inequality is all numbers.
Example: x2 ≧ 0 (MthIO-MathO)
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(INEQ) (aX2 + bX + c)
(aX2 + bX + c ≧ 0)
1 0 0
• "No-Solution" appears on the solution screen when no solution exists for
an inequality (such as X2 < 0).
Ratio Calculations (RA
TIO) (fx-95ES
PLUS only)
The RATIO Mode lets you determine the value of X in the ratio expression
a : b = X : d (or a : b = c : X) when the values of a, b, c and d are known.
The following shows the general procedure for using RATIO.
1. Press
2. On the menu that appears, select (a:b=X:d) or (a:b=c:X).
3. On the Coef
each of the required values (a, b, c, d).
• To solve 3 : 8 = X : 12 for X, for example, press
then input the following for the coef
12 .
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press
• Pressing
Note: The following operations are not supported by the Coef
Editor:
statements also cannot be input with the Coef
4. After all the values are the way you want, press
• This displays the solution (value of X). Pressing again will return
to the Coef
(RATIO) to enter the RATIO Mode.
ficient Editor screen that appears, input up to 10 digits for
in step 1, and
ficients (a = 3, b = 8, d = 12): 3
.
will reset all of the coefficients to zero.
ficient
, (M-), (STO). Pol, Rec, and multi-
ficient Editor.
.
ficient Editor.
8
Important!
• A Math ERROR will occur if you perform a calculation while 0 is input for a coefficient.
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Changing the Ratio Expression Type
Re-enter the RA
from the menu that appears. Changing the ratio expression type causes
the values of all Coefficient Editor coefficients to change to zero.
TIO Mode and select the ratio expression type you want
RATIO Mode Calculation Example
Example 1: To calculate X in the ratio 1 : 2 = X : 10
(RATIO)
(a:b=X:d) 1 2 10
Example 2: T
o calculate X in the ratio 1 : 2 = 10 : X
(RATIO)
(a:b=c:X) 1 2 10
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Technical Information
Errors
The calculator will display an error message whenever an error occurs for
any reason during a calculation.
There are two ways to exit an error message display: Pressing or
to display the location of the error, or pressing to clear the message
and calculation.
Displaying the Location of an Error
While an error message is displayed, press or to return to the
calculation screen. The cursor will be positioned at the location where the
error occurred, ready for input. Make the necessary corrections to the
calculation and execute it again.
Example: When you input 14 ÷ 0 × 2 by mistake instead of 14 ÷ 10 ×
2 (MthIO-MathO)
14 0 2
(or )
1
Clearing the Error Message
While an error message is displayed, press to return to the calculation
screen. Note that this also clears the calculation that contained the error
.
Error Messages
Math ERROR
Cause:
• The intermediate or final result of the calculation you are performing
exceeds the allowable calculation range.
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• Your input exceeds the allowable input range (particularly when using
functions).
• The calculation you are performing contains an illegal mathematical
operation (such as division by zero).
Action:
• Check the input values, reduce the number of digits, and try again.
• When using independent memory or a variable as the argument of a
function, make sure that the memory or variable value is within the
allowable range for the function.
Stack ERROR
Cause:
• The calculation you are performing has caused the capacity of the
numeric stack or the command stack to be exceeded.
Action:
• Simplify the calculation expression so it does not exceed the capacity
of the stack.
• Try splitting the calculation into two or more parts.
Syntax ERROR
Cause:
• There is a problem with the format of the calculation you are
performing.
Action:
• Make necessary corrections.
Argument ERROR
Cause:
• There is a problem with the argument of the calculation you are
performing.
Action:
• Make necessary corrections.
Insufficient MEM Error
Cause:
• The configuration of TABLE Mode parameters caused more than 30
X-values to be generated for a table.
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Action:
• Narrow the table calculation range by changing the Start, End, and
Step values, and try again.
Before Assuming Malfunction of the
Calculator
Perform the following steps whenever an error occurs during a calculation
or when calculation results are not what you expected. If one step does
not correct the problem, move on to the next step.
Note that you should make separate copies of important data before
performing these steps.
1. Check the calculation expression to make sure that it does not contain
any errors.
2. Make sure that you are using the correct mode for the type of
calculation you are trying to perform.
3. If the above steps do not correct your problem, press the
will cause the calculator to perform a routine that checks whether
calculation functions are operating correctly
any abnormality, it automatically initializes the calculation mode and
clears memory contents. For details about initialized settings, see
"Configuring the Calculator Setup".
4. Initialize all modes and settings by performing the following
operation:
...
key. This
. If the calculator discovers
(CLR) (Setup) (Yes).
Replacing the Battery
The battery needs to be replaced after a specific number of years. Also,
replace the battery immediately after display figures become dim.
A low battery is indicated by a dim display
by failure of figures to appear on the display immediately after you turn on
the calculator. If this happens, replace the battery with a new one.
Important!
• Removing the battery will cause all of the calculator’s memory contents to be deleted.
1. Press
2. On the back of the calculator
(OFF) to turn off the calculator.
, remove the screws and the cover.
, even if contrast is adjusted, or
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3. Remove the battery, and then load a new battery with its plus (+) and
minus (-) ends facing correctly
4. Replace the cover.
5. Initialize the calculator:
• Do not skip the above step!
.
(CLR) (All) (Yes).
Calculation Priority Sequence
The priority sequence of input calculations is evaluated in accordance with
the rules below
When the priority of two expressions is the same, the calculation is
performed from left to right.
1 Parenthetical expressions
.
2
3
4 Fractions
5 Negative sign ((-))
6
7 Multiplication where the multiplication sign is omitted
8
Functions that require an argument to the right and a closing
parenthesis ")" following the argument
Functions that come after the input value (x2, x3, x-1, x!, °’ ”, °,
r
, g, %), powers (
STAT Mode estimated values (xˆ, yˆ, xˆ1, xˆ2)
Permutation (nPr), combination (nCr)
), roots ( )
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9 Multiplication (×), division (÷)
10 Addition (+), subtraction (-)
Note
• When squaring a negative value (such as -2), the value being squared must be
enclosed in parentheses (
the negative sign, inputting 2 would result in the squaring of 2 and then
appending a negative sign to the result.
• Always keep the priority sequence in mind, and enclose negative values in
parentheses when required.
2 ). Since x2 has a higher priority than
Calculation Ranges, Number of Digits, and Precision
The calculation range, number of digits used for internal calculation, and
calculation precision depends on the type of calculation you are
performing.
Calculation Range and Precision
Calculation Range ±1 × 10
Number of Digits for
15 digits
Internal Calculation
In general, ±1 at the 10th digit for a single
calculation. Precision for exponential display is
Precision
±1 at the least significant digit. Errors are
cumulative in the case of consecutive
calculations.
-99
to ±9.999999999 × 1099 or 0
Function Calculation Input Ranges and Precision
Functions Input Range
Deg
0 ≦ |x| < 9 × 10
sinx
Rad
0 ≦ |x| < 157079632.7
cosx
Gra
0 ≦ |x| < 1 × 10
9
10
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Deg
Same as sinx, except when |x| = (2n-1) ×
90.
tanx
Rad
π/2.
Same as sinx, except when |x| = (2n-1) ×
Gra
100.
sin-1x, cos-1x 0 ≦ |x| ≦ 1
tan-1x 0 ≦ |x| ≦ 9.999999999 × 10
sinhx, coshx 0 ≦ |x| ≦ 230.2585092
sinh-1x 0 ≦ |x| ≦ 4.999999999 × 10
cosh-1x 1 ≦ x ≦ 4.999999999 × 10
tanhx 0 ≦ |x| ≦ 9.999999999 × 10
tanh-1x 0 ≦ |x| ≦ 9.999999999 × 10
Same as sinx, except when |x| = (2n-1) ×
99
99
99
99
-1
logx, lnx 0 < x ≦ 9.999999999 × 10
x
10
x
e
x 0 ≦ x < 1 × 10
√
2
x
-1
x
3
x |x| < 1 × 10
√
x! 0 ≦ x ≦ 69 (x
-9.999999999 × 1099 ≦ x ≦ 99.99999999
-9.999999999 × 1099 ≦ x ≦ 230.2585092
100
|x| < 1 × 10
|x| < 1 × 10
50
100
100
; x ≠ 0
is an integer)
0 ≦ n < 1 × 1010, 0 ≦ r ≦ n (n, r are integers)
nPr
1 ≦ {n!/(n-r)!} < 1 × 10
100
99
nCr
0 ≦ n < 1 × 1010, 0 ≦ r ≦ n
100
1 ≦ n!/r! < 1 × 10
or 1 ≦ n!/(n-r)! < 1 × 10
58
(n, r are integers)
100
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Pol(x, y)
|x|, |y| ≦ 9.999999999 × 10
x2 + y2 ≦ 9.999999999 × 10
√
99
99
Rec(r, θ)
°’ ”
←
°’ ”
y
x
x
√
y
0 ≦ r ≦ 9.999999999 × 10
99
θ: Same as sinx
a°b’c”: |a|, b, c
< 1 × 10
100
; 0 ≦ b, c
The display seconds value is subject to an error
of ±1 at the second decimal place.
|x| < 1 × 10
100
Decimal ↔ Sexagesimal Conversions
0°0’0” ≦ |x| ≦ 9999999°59’59”
x > 0: -1 × 10
100
< ylogx
< 100
x = 0: y > 0
m
x < 0: y = n,
2n
However: -1 × 10
y > 0: x ≠ 0, -1 × 10
(m, n are integers)
+ 1
100
< ylog |x| < 100
100
< 1/x
logy < 100
y = 0: x > 0
2n + 1
y < 0: x = 2n+1,
(m ≠ 0; m, n
are integers)
m
However: -1 × 10
100
< 1/x
log |y| < 100
Total of integer, numerator, and denominator
a b/
c
must be 10 digits or less (including separator
symbol).
RanInt#(a, b) a < b; |a|, |b| < 1 × 1010; b - a < 1 × 10
10
• Precision is basically the same as that described under "Calculation
Range and Precision", above.
• xy, x√
y, 3√ , x!, nPr, nCr type functions require consecutive internal
calculation, which can cause accumulation of errors that occur with each
calculation.
• Error is cumulative and tends to be large in the vicinity of a function's
singular point and inflection point.
• The range for calculation results that can be displayed in π form when
6
using Natural Display is |x| < 10
. Note, however, that internal calculation
error can make it impossible to display some calculation results in π
form. It also can cause calculation results that should be in decimal form
to appear in π form.
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Specifications
fx-82ES PLUS/fx-95ES PLUS
Power Requirements:
AAA-size battery R03 (UM-4) × 1
Approximate Battery Life:
2 years (based on one hour of operation per day)
Power Consumption:
0.0002 W
Operating T
0°C to 40°C (32°F to 104°F)
Dimensions:
13.8 (H) × 77 (W) × 161.5 (D) mm
1
/2" (H) × 3" (W) × 63/8" (D)
Approximate W
105 g (3.7 oz) including the battery
emperature:
eight:
fx-85ES PLUS
Power Requirements:
Built-in solar cell; button battery LR44 × 1
Approximate Battery Life:
3 years (based on one hour of operation per day)
Operating Temperature:
0°C to 40°C (32°F to 104°F)
Dimensions:
11.1 (H) × 77 (W) × 161.5 (D) mm
3
/8" (H) × 3" (W) × 63/8" (D)
Approximate W
95 g (3.4 oz) including the battery
eight:
fx-350ES PLUS
Power Requirements:
Button battery LR44 x 1
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Approximate Battery Life:
3 years (based on one hour of operation per day)
Power Consumption:
0.0002 W
Operating T
0°C to 40°C (32°F to 104°F)
Dimensions:
11.1 (H) × 77 (W) × 161.5 (D) mm
3
/8" (H) × 3" (W) × 63/8" (D)
Approximate Weight:
95 g (3.4 oz) including the battery
emperature:
Verifying the Authenticity of Your Calculator
Use the steps below to verify that your calculator is a genuine CASIO
calculator.
1. Press
2. Press .
• This displays the information below.
- Calculator ID number (24-character string)
- QR Code for accessing the W
(https://wes.casio.com/calc/)
3. Access the above site.
4. Follow the instructions on the display to verify the authenticity of your
calculator.
Press
.
orldwide Education Service
to return to the mode menu.
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Frequently Asked Questions
Example: (sin 30) + 15 (Angle Unit: Deg)
Frequently Asked Questions
■ How can I perform input and display results the same way I did on
a model that does not have Natural T
→ Perform the following key operation:
"Configuring the Calculator Setup" for more information.
■ How can I change a fraction form result to decimal form?
How can I change a fraction form result produced by a division
operation to decimal form?
→ See "T
■ What is the difference between Ans memory, independent memory,
and variable memory?
→ Each of these types of memory acts like "containers" for temporary
storage of a single value.
Ans Memory:
Stores the result of the last calculation performed. Use this memory to
carry the result of one calculation on to the next.
Independent Memory:
Use this memory to totalize the results of multiple calculations.
Variables:
This memory is helpful when you need to uses the same value multiple
times in one or more calculations.
oggling Calculation Results" for the procedure.
extbook Format?
(SETUP) (LineIO). See
■ What is the key operation to take me from the STAT Mode or TABLE
Mode to a mode where I can perform arithmetic calculations?
→ Press
■ How can I return the calculator to its initial default settings?
→ Perform the following key operation: (CLR) (Setup) (Yes).
■ When I execute a function calculation, why do I get a calculation
result that is completely different from older CASIO calculator
models?
→ With a Natural T
uses parentheses must be followed by a closing parenthesis. Failing to
press
unwanted values or expressions to be included as part of the argument.
(COMP).
extbook Display model, the argument of a function that
after the argument to close the parentheses may cause
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0.707106781230 15
Older (S-V.P.A.M.) Model: 30 15 15.5
Natural Textbook Display Model:
Failure to press here as shown below will result in calculation of sin
45.
(LineIO) 30 15 15.5
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© 2019 CASIO COMPUTER CO., LTD.
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