Casio FX-55, FX55PLUSTP, EDWKBK55PLUS, FX55BU-TP, fx55Plus User Manual

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Casio FX-55, FX55PLUSTP, EDWKBK55PLUS, FX55BU-TP, fx55Plus User Manual

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fx-55 PLUS

User’s Guide

CASIO Worldwide Education Website

http://edu.casio.com

CASIO EDUCATIONAL FORUM

http://edu.casio.com/forum/

Contents

Important Information ..............................................................

2

Sample Operations...................................................................

2

Initializing the Calculator .........................................................

2

Safety Precautions ...................................................................

2

Handling Precautions...............................................................

2

Removing the Hard Case .........................................................

3

Turning Power On and Off.......................................................

3

Adjusting Display Contrast .....................................................

3

Key Markings ............................................................................

3

Reading the Display .................................................................

4

Configuring the Calculator Setup ...........................................

4

Inputting Expressions and Values..........................................

5

Toggling Calculation Results ..................................................

8

Basic Calculations....................................................................

8

Remainder Calculations ........................................................

11

Function Calculations ............................................................

12

Calculation Ranges, Number of Digits, and Precision........

14

Errors.......................................................................................

15

Before Assuming Malfunction of the Calculator... ..............

16

Replacing the Battery.............................................................

17

Specifications .........................................................................

17

Frequently Asked Questions.................................................

17

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Important Information

The displays and illustrations (such as key markings) shown in this User’s

Guide are for illustrative purposes only, and may differ somewhat from the actual items they represent.

The contents of this manual are subject to change without notice.

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.

Be sure to keep all user documentation handy for future reference.

Sample Operations

Sample operations in this manual are indicated by a icon. Unless specifically stated, all sample operations 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.

For information about the K and L marks that are shown in the sample operations, see “Configuring the Calculator Setup”.

Initializing the Calculator

Perform the following procedure when you want to initialize the calculator and return the setup to their initial default settings. Note that this operation also clears all data currently in calculator memory.

r3(All)=(Yes)

Safety Precautions

Battery

Keep batteries out of the reach of small children.

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 at least once every three years (LR44 (GPA76)).

A dead battery can leak, causing damage to and malfunction of the calculator. Never leave a dead battery in the calculator. Do not try using the calculator while the battery is completely dead.

The battery that comes with the calculator discharges slightly during shipment and storage. Because of this, it may require replacement sooner than the normal expected battery life.

Do not use an oxyride battery* or any other type of 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.

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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.

*Company and product names used in this manual may be registered trademarks or trademarks of their respective owners.

Removingthe HardCase

Before using the calculator, slide its hard case downwards to remove it, and then affix the hard case to the back of the calculator as shown in the illustration nearby.

Turning Power On and Off

Press O to turn on the calculator.

Press 1A(OFF) to turn off the calculator.

Auto Power Off

Your calculator will turn off automatically if you do not perform any operation for about 10 minutes. If this happens, press the Okey to turn the calculator back on.

Adjusting DisplayContrast

Display the CONTRAST screen by performing the following key operation: s8(]CONT'). Next, use d and e to adjust contrast. After the setting is the way you want, press A.

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 1 key followed by a second key performs the alternate function of the second key. The alternate function is indicated by the text printed above the key.

Alternate function

OFF

A

Keycap function

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Reading the Display

The display of the calculator shows expressions you input, calculation results, and various indicators.

Math

Indicators

Input expression

Calculation result

If a g indicator appears on the right side of the input expression, it means the displayed calculation continues to the right. Use e and d to scroll the input expression display.

Display indicators

This

Means this:

indicator:

The keypad has been shifted by pressing the 1 key. The

Skeypad will unshift and this indicator will disappear when you press a key.

M

There is a value stored in independent memory.

FIX

A fixed number of decimal places is in effect.

 

 

Math

Appears when natural calculation formula input (using

the same format as a formula is written) is enabled. Also

 

appears when LineO 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.

 

 

 

Appears when “Manual” is selected for the “Simp” setting

 

on the setup menu, and indicates that the fraction result of

 

a calculation can be simplified.

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.

ConfiguringtheCalculatorSetup

Press sto display the setup menu. Press the number key for the item you want to configure. To close the setup menu without changing any setting, press A or s.

Underlined ( ___ ) settings are initial defaults.

1MathO 2LineO Specifies the display format.

MathO displays input and calculation results using the same format as they are written on paper.

LineO displays input the same way as MathO, but calculation results are displayed in decimal form.

Math

Math

Note: In this manual, the Ksymbol next to a sample operation indicates MathO, while the L symbol indicates LineO.

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3Fix 4Norm Specifies the number of digits for display of a calculation result.

Fix: The value you specify (from 0 to 9) controls the number of decimal places for displayed calculation results. Calculation results are rounded off to the specified digit before being displayed.

Example: L 100 ÷ 7 = 14.286 (Fix 3)

14.29(Fix 2)

Norm: Selecting one of the two available settings (Norm 1, Norm 2) determines the range in which results will be displayed in non-exponential format. Outside the specified range, results are displayed using exponential format.

Norm 1: 10–2 |x|, |x| 1010 Norm 2: 10–9 |x|, |x| 1010

Example: L 1 ÷ 200 = 5 × 10–3

(Norm 1)

0.005

(Norm 2)

 

 

5ab/c 6d/c Specifies either mixed fraction (ab/c) or improper fraction

(d/c) for display of fractions in calculation results.

7Simp 1Auto ; 2Manual Specifies automatic or manual simplification of fractions. When manual is specified, fraction calculation results are always displayed as improper fractions, even if the fraction display format setting is ab/c.

Even if the result of a calculation can be displayed as a fraction when automatic simplification is used, performing the same calculation with manual simplification may produce a non-fraction (decimal) result.

Example: 2 23 × 5 18

sh(Simp)b(Auto)

k2 e2 c3 e*k5 e1 c8 = 413

sh(Simp)c(Manual)

328

 

k2 e2 c3 e*k5 e1 c8 =

 

 

 

24

 

 

 

 

 

 

8]CONT' Adjusts display contrast. See “Adjusting Display Contrast” for details.

Initializing Calculator Settings

Perform the following procedure to initialize the calculator, which returns all settings, including setup menu settings, to their initial defaults.

f1(Setup)=(Yes)

InputtingExpressions and Values

Basic Input Rules

Calculations can be input in the same form as they are written. When you press = the priority sequence of the input calculation will be evaluated automatically and the result will appear on the display.

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