Radio Shack EC 235 User Manual

EC-235 8-Digit Pocket Calculator  
OWNER’S MANUAL — Please read before using this equipment.  
Your RadioShack EC-235 8-Digit Pocket Calculator’s compact size  
lets you use it almost anywhere.  
Exponential, Square Root,  
and Reciprocal Calculations  
Percentage Key — simplifies discount, percentage, and tax calcula-  
tions.  
Calculation  
23 = 8  
You Press  
2 × = =  
2
You See  
;1  
Square Root Key — quickly computes the square root of the dis-  
played number.  
The square root of 2 is 1.4142135  
1/8 = 0.125  
417475468  
31458  
8 ÷ =  
Constant Calculations — let you add, subtract, divide, or multiply the  
same number over and over without having to re-enter that number.  
Memory Calculations  
Large 8-Digit Liquid Crystal Display — makes it easy to read calcu-  
lation results.  
To store a value in memory, first clear the memory and the display by  
MR  
pressing  
(Memory Recall/Clear) twice, then press CE.  
C
Protective Wallet — protects the calculator’s keypad.  
To add a value to memory, enter the number or calculation you want to  
add, then press M+. The calculator totals the current calculation (if one  
is pending) and adds that value to memory.  
OPERATION  
You can enter basic, mixed, percentage,  
add-on, and discount calculations.  
To subtract a value from memory, enter the number or calculation you  
want to subtract, then press M–. The calculator totals the current calcu-  
lation (if one is pending) and subtracts that value from memory.  
Press ON/C to turn on your calculator.  
MR  
To recall the value from memory, press  
once.  
C
If you do not press a key for about 8 minutes,  
your calculator automatically turns off. To  
turn it off sooner, press OFF.  
Calculation Errors  
appears when:  
(5525  
Correcting Entry Errors  
• A calculation result exceeds 8 digits. This is an overflow error (see  
“Estimating Calculation Results” ).  
If you enter an incorrect value, press CE  
(Clear Entry) once. Then enter the correct  
value and continue your calculation.  
• A memory calculation result exceeds 8 digits to the left of the dec-  
imal point. The memory contents remain unchanged.  
To clear the display for a new calculation,  
press ON/C (On/Clear) so 31 appears (this also clears the calculator’s  
memory). Then begin the new calculation.  
You try to divide by 0.  
You try to calculate the square root of a negative number.  
If you press an incorrect operator key (+, , ×, ÷), simply press the cor-  
rect key and continue your calculation.  
If (5525 appears, press ON/C to clear the error.  
Constant Calculations  
Estimating Calculation Results  
If you perform an operation that results in an overflow error, you can  
estimate the correct result (to 8 significant digits) by following these  
steps.  
For addition, subtraction, and division, the value you enter before  
pressing = is the constant. For multiplication, the value you enter be-  
fore pressing × is the constant.  
1. Count the number of digits to the left of the decimal point.  
2. Remove the decimal point.  
Calculation  
You Press  
You See  
7 + 3 = 10  
5 + 3 = 8  
+
431  
;1  
7
3 =  
5 =  
3. Add as many zeros to the right of the number as there were digits  
to the left of the decimal point.  
260 × 12.3 = 3198  
260 × 4.15 =  
64<;1  
43:<1  
260 × 12.3 =  
4.15 =  
For example, if (5525#413475397 appears, the approximate answer is  
101,420,640. If (5525#64<1:367: appears, the approximate answer is  
31,970,347,000.  
© 2000 RadioShack Corporation.  
All Rights Reserved.  
RadioShack and RadioShack.com are trademarks used by RadioShack Corporation.  

Raypak XPAK 85 User Manual
Raypak 42 66 User Manual
Plantronics Bluetooth Headset C720 User Manual
Pelco Car Satellite Radio System C578M User Manual
Panasonic Camcorder AG HVX200 User Manual
Panasonic AG DVG7P User Manual
Market Forge Industries Boiler Gas Operated Boiler User Manual
Kenwood KRC 309S User Manual
Kenwood KDC 315V User Manual
Kambrook Cable Box keb542 User Manual