For example:

 

You press

You see

 

 

 

3

+ 4 =

7.

 

 

 

8

3 – 4 =

20.

 

 

 

6

3 + 2 =

4

 

 

 

Press C/CE once to clear the last entry. Press C/CE twice to clear all pending calculations.

Note: If the result of a calculation has more than 10 digits, or if you try to di- vide by 0, E (error) appears. To clear the error, press C/CE.

Square Calculations

To do square calculations, press the number and , then =.

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Radio Shack EC-291 owner manual Square Calculations