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FRACTION/SCIENTIFIC CALCULATOR
MODEL EL-500W
OPERATION MANUAL
INTRODUCTION
Thank you for purchasing the SHARP Fraction/Scientific Calculator Model EL-500W. 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
¥Do not carry the calculator around in your back pocket, as it may break when you sit down. The display is made of glass and is particularly fragile.
¥Keep the calculator away from extreme heat such as on a car dashboard or near a heater, and avoid exposing it to excessively humid or dusty environments.
¥Since this product is not waterproof, do not use it or store it where fluids, for example water, can splash onto it. Raindrops, water spray, juice, coffee, steam, perspiration, etc. will also cause malfunction.
¥Clean with a soft, dry cloth. Do not use solvents or wet cloth.
¥Do not drop it or apply excessive force.
¥Never dispose of batteries in a fire.
¥Keep batteries out of the reach of children.
¥This product, including accessories, may change due to upgrading without prior notice.
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 following 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 inoperative.
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 |
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displayed. Press </>to see the remaining |
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(hidden) section. |
2ndF |
: Appears when @is pressed, indicating that the |
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functions shown in orange are enabled. |
SIMP |
: Indicates that a fraction can be simplified further, or |
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expressed with a lower denominator. |
DEG/RAD/GRAD: Indicates angular units (Degrees, Radians and Grads) and changes each time Gis pressed.
’: Appears when statistical mode is selected.
M: Indicates that a numerical value is stored in the independent memory.
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., Ò100Ó will be indicated instead of Ò10 0Ó).
Power On and Off
Press Nto turn the calculator on, and @Fto turn it off.
Clearing Methods
There are three clearing methods as follows:
Clearing |
Entry |
M*1 |
STAT, ANS*2 |
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operation |
(Display) |
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N |
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× |
× |
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@c |
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× |
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RESET |
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: Clear |
× : Retain |
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*1 |
Independent memory M. |
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*2 |
Statistical data and last answer memory. |
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¥ 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.
15 |
+ 8 |
N15 +8 |
15+8_ |
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↓ |
<<dd |
15_ |
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15 |
Ð 3 |
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-3 |
15Ð3_ |
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13 |
× 24 = N13 *24 = |
312. |
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↓ |
<(>) |
13×24 |
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15 |
× 24 = |
>d5 = |
360. |
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Priority Levels in Calculation
This calculator performs operations according to the following priority:
Q Functions expressed with numerical data placed before (such as X-1, X2, n!)
W Yx, x¿Y
E π
RFunctions expressed with numerical data placed after (such as sin, cos)
TMultiplications with the sign Ò×Ó omitted from the front of a function (such as 3cos20)
Y NCR, NPR
U ×, Ö
I +, Ð
O Operations end commands (such as =, M+, %, DEG, RAD, GRAD, DATA, CD)
¥A parenthesized calculation section has precedence over other sections of the calculation.
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.
(1.2 × 1020) × (1.5 × 105) |
1.2 E20 |
*1.5 E5 = 1.8×1025 |
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3 Ö 7 = |
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[Floating point] |
N3 /7 = |
0.428571428 |
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→ [Scientific notation] @´ |
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4.285714286×10Ð01 |
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[TAB set to 2] |
@i2 |
4.29×10Ð01 |
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→ [Floating point] |
@´ |
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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 @i9.
¥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.
DEG (°)
Press G
GRAD (g) |
RAD (rad) |
SCIENTIFIC CALCULATIONS
¥Select the normal mode.
¥In each example, press Nto clear the display before performing the calculation.
Arithmetic Operations
12+16×3= |
N12 |
+16 *3 = |
60. |
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350Ð120Ö4= |
350 -120 /4 = |
320. |
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72×(-12)Ð150= |
72 *–12 -150 = |
Ð1014. |
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(5+21)×(30Ð16)= |
(5 +21 )* |
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(30 |
-16 )= |
364. |
(6×103)Ö(2×10-4)= (6 E3 )/
(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= |
N245 |
+60 = |
305. |
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12+60= |
N212 |
+60 = |
72. |
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150Ð20= |
150 |
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20 = |
130. |
250Ð20= |
250 |
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20 = |
230. |
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200Ö4= |
200 |
/ |
4 = |
50. |
180Ö4= |
180 |
/ |
4 = |
45. |
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15×3= |
15 * 3 = |
45. |
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15×10= |
15-10 = |
150. |
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Functions
¥For each example, press Nto clear the display.
¥Before starting calculations, specify the angular unit.
¥The results of inverse trigonometric functions are displayed within the following range:
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θ = sinÐ1 X, θ = tanÐ1 X |
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θ = cosÐ1 X |
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DEG |
Ð90 ≤ θ ≤ 90 |
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0 ≤ θ ≤ 180 |
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RAD |
π |
π |
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0 ≤ θ ≤ π |
Ð Ñ ≤ θ ≤ |
Ñ |
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2 |
2 |
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GRAD |
Ð100 ≤ θ ≤ 100 |
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0 ≤ θ ≤ 200 |
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sin60[¡]= |
Ns60 = |
0.866025403 |
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π |
Gu(@V/4 |
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cosÐ[rad]= |
)= |
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0.707106781 |
4 |
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tanÐ11=[g] |
G@T1 = |
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G |
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50. |
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ln 20 = |
@I20 = |
2.995732274 |
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log 50 = |
@l50 = |
1.698970004 |
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E3 = |
@e3 = |
20.08553692 |
101.7 = |
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@¡1.7 = |
50.11872336 |
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32 + 52 = |
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3 |
@L+5 @L= |
34. |
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√ |
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+ 3√ |
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@⁄32 +3 @$ |
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32 |
21 |
8.415778426 |
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21 = |
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74 = |
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7 |
@™4 = |
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2401. |
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4! = |
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4 |
@!= |
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24. |
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10P3 = |
10 @q3 = |
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720. |
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5C2 = |
5 |
@Q2 = |
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10. |
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π |
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@V/3 = |
1.047197551 |
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Ð = |
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3 |
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1 |
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4 |
@•+5 @•= |
0.45 |
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Ð + Ð = |
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4 |
5 |
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200 × 32% = 200 |
*32 @% |
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64. |
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150 Ö 300 = ?% 150 |
/300 @% |
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50. |
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200 + (200 × 32%) = 200 |
+32 @% |
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264. |
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300 Ð (300 × 25%) = 300 |
-25 @% |
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225. |
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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 @gare pressed, the angular unit changes in sequence.
90¡→ [rad] |
N90 @g |
1.570796327 |
→ [g] |
@g |
100. |
→ [¡] |
@g |
90. |
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sinÐ10.8 = [¡] |
@S0.8 = |
53.13010235 |
→ [rad] |
@g |
0.927295218 |
→ [g] |
@g |
59.03344706 |
→ [¡] |
@g |
53.13010235 |
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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 NOto clear the independent memory (ÒMÓ 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.
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N3 *5 O |
15.M |
30 + (3 × 5) = |
30 +R= |
45.M |
(3 × 5) × 4 = |
R*4 = |
60.M |
20+10Ð5= |
N20 +10 -5 O |
25.M |
121+13×2= |
121 +13 *2 @; |
147.M |
+) 21×3Ð16= |
21 *3 -16 @; |
47.M |
(Total) |
R |
219.M |
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NO |
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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 |
N6 |
+4 |
= |
10. |
ANS + 5 |
+5 |
= |
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15. |
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8 × 2 = ANS |
8 *2 = |
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16. |
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ANS2 |
@L= |
256. |
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4 Ö 5 = 0.8É(A) |
N4 |
/5 |
= |
0.8 |
4 × (A) + 60 Ö (A) = 4 *@?+60 / |
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@?= |
78.2 |
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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:
What is the G.C.F. |
N24 |
24_ |
of 24 and 36? |
@œ36 |
24GCF36_ |
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12. |
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What is the L.C.M. |
N15 |
15_ |
of 15 and 9? |
@ˆ9 |
15LCM9_ |
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45. |
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Calculating Quotient and Remainder
“: Calculates the quotient and remainder.
23 Ö 5 |
N |
23 |
@“5 |
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23‘5_ |
(R: Remainder) = |
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4. |
R3. |
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9.5 Ö 4 |
9.5 @“4 |
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9.5‘4_ |
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2. |
R1.5 |
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Ð32 Ö (Ð5) |
– |
32 |
@“–5 |
Ð32‘Ð5_ |
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= |
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6. |
RÐ2. |
¥Pressing “cannot be followed by pressing a key for another operation such as (+, Ð, ×, Ö), otherwise an error will result.
¥The calculator can display a quotient or remainder up to 5 digits in length, including the ÒÐÓ sign. If numbers longer than 5 digits are entered, normal division is performed.
FRACTION CALCULATIONS
Entering Fractions
¥To enter fractions, use the following keys:
Ø: Places the symbol Ò/Ó between the numerator and the denominator.
∞: Separates the integer (whole number) part from the fractional part of a mixed number.
2 |
N2 |
Ø3 |
= |
2/3 |
4Ð = |
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3 |
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1 |
4 |
∞1 |
Ø2 = |
4¬1/2 |
4Ð = |
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2 |
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¥Up to 10 key strokes, including Ò¬Ó and Ò/Ó, can be used to enter a fraction.
Calculating with Fractions
Fractions can be incorporated into an arithmetic calculation.
ÒSIMPÓ symbol will appear with a calculation result if the answer can be further simplified. Refer to the following section of this manual for details.