To Perform Constant Calculations; To Correct Errors In Calculations; About Calculation Errors - Casio SF-4990 User Manual

To perform constant calculations

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To correct errors in calculations

If you enter a wrong value, press
If you press the wrong arithmetic operator key (!, @, #, $), simply press the
correct key before entering anything else.

About calculation errors...

Whenever an error occurs, the indicator "E" appears on the display.
1. Enter the Calculator Mode.
2. Enter the calculation, pressing the arithmetic operator
key twice. This will causes the "K" indicator to appear on
the display to indicate a constant calculation.
•
You can use this constant calculation technique for
addition, subtraction, multiplication, and division.
3. Press & to display the initial result (in this case, 5).
4. Press & again to add 3 to the result (in this case, 5 + 3
= 8).
•
You can repeat the above operation as many times as
you like. Each time you press &, the previous result
obtained is added to, subtracted from, multiplied by, or
divided by the value to the left of the arithmetic operator.
•
To clear a constant calculation, press
and then enter the correct value.
C
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Using the Calculator
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