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 calcula-
tion, 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 inciden-
tal 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
, x
2
, n!)
2 y
x
,
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 × 10
20
) × (1.5 × 10
5
) 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 ordi-
nary 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*
1
STAT, 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 immedi-
ately 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 calcula-
tions.
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 num-
bers 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
π
π
θ θ θ
≤ θ ≤ ≤ θ ≤
≤ θ ≤ ≤ θ ≤ π
≤ θ ≤ ≤ θ ≤
→
→
→
→
→
→
→
→
→
→
→
→
→
σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
Σ
σ
Σ
≠
≠
≠
≤
≤
≠
≠
≠
≤
≤
≠
≤ ≤
≤ ≤ ≤
→ →
→
π
π
π
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.
π
√ √
π