# 12.2 Common operations

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To | Key sequence
--- | ---
Turn on |
Turn off | (OFF) Note that the calculator will automatically turn off if not used for about 6 minutes.
Adjust the display contrast | (SETUP) (◄CONT►) then use and to adjust, and press when finished.
Restore the factory settings | (CLR) (Setup) (Yes)
Clear the contents of all memories | (CLR) (Memory) (Yes)
Restore the default settings and clear all memories | (CLR) (All) (Yes)
Cancel a calculation, or exit menus |
Obtain an answer |
Obtain a decimal answer in Math mode |
Toggle between exact and decimal answers in Math mode |
Toggle between displaying fractions as improper fractions or mixed numbers in Math mode |
Use the result of the previous calculation… |
… e.g. to find 42 minus the previous result |
Store a value in ‘M’ memory | (STO) (M)
Clear a value stored in the M memory | (STO) (M)
Add a value to that in the ‘M’ memory |
Subtract a value from that in the ‘M’ memory | (M-)
Display the value stored in the ‘M’ memory | (M)
Use the value in the ‘M’ memory in a calculation… |
… e.g. to find 42 minus the value in the ‘M’ memory | (M)
Set angles to be measured in degrees | (SETUP) (Deg)
Set angles to be measured in radians | (SETUP) (Rad)
Set answers to be displayed to 3 decimal places (To use a different number of decimal places, replace with that number) | (SETUP) (Fix)
Set answers to be displayed in scientific notation with 3 significant figures (To use a different number of significant figures, replace with that number) | (SETUP) (Sci)
Cancel any display rounding settings | (SETUP) (Norm)

The A, B, C, D, X, Y memories are used similarly to the M memory, except that these have no ‘add to’ and ‘subtract from’ functions.

OpenLearn - Using a scientific calculator
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