SHARP EL-500M User Manual

EL-500M

FRACTION/SCIENTIFIC CALCULATOR

OPERATION MANUAL

MODEL

INTRODUCTION

Thank you for purchasing the SHARP Fraction/Scientific
Calculator Model EL-500M. This calculator will help you
understand mathematical concepts behind fraction calcula­tion, such as simplification and reduction.
After reading this manual, store it in a convenient location
for future reference.

Operational Notes

To ensure trouble-free operation, observe the following points:

1. Do not carry the calculator in the back pocket of slacks or
trousers.

2. Do not subject the calculator to extreme temperatures.

3. Do not drop it or apply excessive force.

4. Clean only with a soft, dry cloth.

5. Do not use or store the calculator where fluids can splash
onto it.

SHARP will not be liable nor responsible for any inciden­tal or consequential economic or property damage caused
by misuse and/or malfunctions of this product and its
peripherals, unless such liability is acknowledged by law.

♦ Press the RESET switch (on the back) only in the follow-

ing cases. Note that pressing the RESET switch erases
all data stored in memory.

• Before using for the first time

• After replacing the batteries

• To clear all memory contents

• If an abnormal condition occurs and all keys are inop-

erative.

If service should be required for the calculator, use only a
SHARP servicing dealer, SHARP approved service facility,
or SHARP repair service where available.

Hard Case

DISPLAY

Symbol

Mantissa

Exponent

(All symbols will not be displayed simultaneously, as shown
above.)

/

: Appears when the entire equation cannot be dis-

played. Press </> to see the remaining
(hidden) section.

2ndF : Appears when @ is pressed, indicating that the

functions shown in orange are enabled.

15 + 8 N 15 + 8

15+8_

15 – 3

<<dd

15_

- 3

15–3_

13 × 24 = N 13 * 24 =

312.

<(>)

13×24

15 × 24 = >d 5 =

360.

↓

↓

Priority Levels in Calculation

This calculator performs operations according to the following
priority:
1 Functions expressed with numerical data placed before

(such as x-1, x2, n!)

2 yx,

x

¿

y

3 π
4 Functions expressed with numerical data placed after (such

as sin, cos)

5 Multiplications with the sign “×” omitted from the front of a

function (such as 3cos20)

6 nCr, nPr

(1.2 × 1020) × (1.5 × 105) 1.2 E 20 * 1.5 E 5

=

1.8×10

25

3 ÷ 7 =
[Floating point] N 3 / 7 =

0.428571428

→ [Scientific notation] @´

4.285714286×10

–01

[TAB set to 2] @i 2

4.29×10

–01

→ [Floating point] @´

0.428571428

• Use @´ to switch to the scientific notation, press
@i, then give a value between 0 and 9 to set the

decimal placement. To reset, press @i 9.

• The number will be displayed in scientific notation if the
floating point value does not fit in the following range:

0.000000001 ≤ | x | ≤ 9999999999

• The last decimal digit in scientific notation will be rounded
off.

Determination of the Angular Unit

In this calculator, the following three angular units (degrees,
radians, and grads) can be specified.

BEFORE USING THE CALCULATOR

Key Notation Used in this Manual

In this manual, key operations are described as follows:

To specify π : @V
To specify Exp: E

To access functions printed in orange above keys, press @
first.
In this manual, number entry examples are shown with ordi­nary numbers (i.e., “100” will be indicated instead of
“100”).

Power On and Off

Press N to turn the calculator on, and

@F

to turn it off.

Clearing Methods

There are three clearing methods as follows:

Clearing Entry M*1STAT, ANS*

2

operation (Display)

N ××
@c ×

RESET

: Clear × : Retain

*

1

Independent memory M.

*

2

Statistical data and last answer memory.

• To clear the independent memory (M), press NO.

Editing the Equation

• Press < or > to move the cursor.

To return to the equation after getting an answer, press
< (>).

• To delete a number, place the cursor on the number to be

deleted, then press d.

• To insert a number, move the cursor to the place immedi­ately after where the number is to be inserted, then enter
the number.

SIMP : Indicates that a fraction can be simplified further, or

expressed with a lower denominator.

DEG/RAD/GRAD: Indicates angular units (Degrees, Radians

and Grads) and changes each time G is pressed.

’ : Appears when statistical mode is selected.
M:Indicates that a numerical value is stored in the

independent memory.

INITIAL SETUP

Mode Selection

Normal Mode:
Used to perform arithmetic operations and function calcula­tions.

Statistical Mode:
Used to perform statistical operations. To enter statistical
mode, press @”. ’ appears on the display to
indicate that the statistical mode is selected. To return to
normal mode, press @” with ’ on the display.
’ disappears as the calculator returns to normal mode.

• The mode will remain selected when the calculator is turned
off.

• When executing mode selection, last answer memory will
be cleared.

Scientific Notation

People who need to deal with very large and very small num­bers often use a special format called exponential or scientific
notation.

A number expressed in scientific notation has two parts. The
first part consists of a regular decimal number between 1 and

10. The second part represents how large or small the number

is in powers of 10.

While a calculation result is displayed in the floating point
system, press @´ to display the result in the scientific
notation system. Pressing @´ once again will bring
back the floating point system.

To enter a number in scientific notation, press E.

DEG (°)

GRAD (g) RAD

(rad)

Press G

7 ×, ÷
8 +, –
9 Operations end commands (such as =, M+, %,

DEG,

RAD, GRAD, DATA, CD)

•A parenthesized calculation section has precedence over

other sections of the calculation.

Random Numbers

A pseudo-random number with three significant digits can be
generated by pressing @`=. To generate the next
random number, press =.

Angular Unit Conversions

Each time @g are pressed, the angular unit changes
in sequence.

Memory Calculations

This calculator has two memory allocations: independent
memory (M), and last answer memory (ANS). You will find
them especially useful when combinations of calculations be­come complicated, or when using the answer of previous
calculation to another operations.

Press NO to clear the independent memory (“M” sym­bol will disappear).

Independent memory (M)

O : Stores the result in the memory.
R : Recalls the value stored in the memory.

@; : Adds the result to the value in the memory.

Last answer memory (ANS)
When = is pressed, the calculation result will automati­cally be stored in the last answer memory.

@? : Recalls the value stored in last answer memory.

6+4 = ANS N 6 + 4 =

10.

ANS + 5 + 5 =

15.

Arithmetic Operations

12+16×3= N 12 + 16 * 3 =

60.

350–120÷4= 350 - 120 / 4 =

320.

72×(-12)–150= 72 *– 12 - 150 =

–1014.

(5+21)×(30–16)= ( 5 + 21 )*

( 30 - 16 )=

364.

(6×103)÷(2×10-4)=

( 6 E 3 )/
( 2 E– 4 )=

30000000.

Constant Calculations

In constant calculations, the addend becomes a constant.
Subtraction and division are performed in the same manner.
For multiplication, the multiplicand becomes a constant.

245+60= N 245 + 60 =

305.

12+60= N 212 + 60 =

72.

150–20= 150 - 20 =

130.

250–20= 250 - 20 =

230.

200÷4= 200 / 4 =

50.

180÷4= 180 / 4 =

45.

15×3= 15 * 3 =

45.

15×10= 15- 10 =

150.

Functions

• For each example, press N to clear the display.

• Before starting calculations, specify the angular unit.

• The results of inverse trigonometric functions are displayed
within the following range:

N 3 * 5 O

15.

M

30 + (3 × 5) = 30 +R=

45.

M

(3 × 5) × 4 = R* 4 =

60.

M

20+10–5= N 20 + 10 - 5 O

25.

M

121+13×2= 121 + 13 * 2 @;

147.

M

+) 21×3–16= 21 * 3 - 16 @;

47.

M

(Total) R

219.

M

NO

FRACTION CALCULATIONS

Entering Fractions

• To enter fractions, use the following keys:

Ø : Places the symbol “

/

” between the numerator

and the denominator.

∞ : Separates the integer (whole number) part

from the fractional part of a mixed number.

• Up to 10 key strokes, including “¬” and “

/

”, can be used

to enter a fraction.

4– = N 2 Ø 3 =

2/3

4– = 4 ∞ 1 Ø 2 =

4

¬¬

¬¬

¬

1/2

2
3

1
2

π

2

π

2

θ = sin–1 x, θ = tan–1 x θ = cos–1 x

DEG –90 ≤ θ ≤ 90 0 ≤ θ ≤ 180

RAD – — ≤ θ ≤

—

0 ≤ θ ≤ π

GRAD –100 ≤ θ ≤ 100 0 ≤ θ ≤ 200

90°→ [rad] N 90 @g

1.570796327

→ [g] @g

100.

→ [°] @g

90.

sin–10.8 = [°] @S 0.8 =

53.13010235

→ [rad] @g

0.927295218

→ [g] @g

59.03344706

→ [°] @g

53.13010235

Calculating the Greatest Common Factor (G.C.F.)
or Least Common Multiple (L.C.M.)

To calculate the G.C.F. or the L.C.M., the procedures are as
follows:

Calculating Quotient and Remainder

“: Calculates the quotient and remainder.

• Pressing “ cannot be followed by pressing a key for

another operation such as (+, –, ×, ÷), otherwise an error
will result.

• The calculator can display a quotient or remainder up to 5
digits in length, including the “–” sign. If numbers longer
than 5 digits are entered, normal division is performed.

What is the G.C.F.

N 24

24_

of 24 and 36?

@œ 36

24GCF36_

=

12.

What is the L.C.M.

N 15

15_

of 15 and 9?

@ˆ 9

15LCM9_

=

45.

Calculating with Fractions

Fractions can be incorporated into an arithmetic calculation.

“SIMP” symbol will appear with a calculation result if the
answer can be further simplified. Refer to the following sec­tion of this manual for details.

– + – = N 1 Ø 2 + 1 Ø 3 =

5/6

– × – = 2 Ø 5 * 1 Ø 3 =

2/15

1
2
2
5

1
3
1
3

SCIENTIFIC CALCULATIONS

• Select the normal mode.

• In each example, press N to clear the display before

performing the calculation.

23 ÷ 5 N 23 @“ 5

23‘5_

(R: Remainder) =

4.

R

3.

9.5 ÷ 4 9.5 @“ 4

9.5‘4_

=

2.R1.5

–32 ÷ (–5) – 32 @“– 5

–32‘–5_

=

6.R–2.

10P3

= 10 @q 3 =

720.

5C2

=5 @Q 2 =

10.

– = @V/ 3 =

1.047197551

– + – = 4 @• + 5 @•=

0.45

200 × 32% = 200 * 32 @%

64.

150 ÷ 300 = ?% 150 / 300 @%

50.

200 + (200 × 32%) =

200 + 32 @%

264.

300 – (300 × 25%) =

300 - 25 @%

225.

π

3

141

5

8 × 2 = ANS 8 * 2 =

16.

ANS

2

@L=

256.

4 ÷ 5 = 0.8…(A) N 4 / 5 =

0.8

4 × (A) + 60 ÷ (A) =

4 *@?+ 60 /

@?=

78.2

sin60[°]= Ns 60 =

0.866025403

cos–[rad]=

Gu(@V/ 4
)=

0.707106781

tan–11=[g]

G@T 1 =
G

50.

ln 20 = @I 20 =

2.995732274

log 50 = @l 50 =

1.698970004

e3 = @e 3 =

20.08553692

10

1.7

= @¡ 1.7 =

50.11872336

32 + 52 =3 @L + 5 @L=

34.

√32 + 3√21 =

@⁄ 32 + 3 @$
21 =

8.415778426

74 =7 @™ 4 =

2401.

4! = 4 @!=

24.

π

4