HP OmniBook 5700 Notebook PC - Manual (Page 46)

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HP Calculator “takes over” part of your OmniBook’s keyboard and reassigns
functions to it. You can see these functions and the applicable keys on the display of
calculator buttons—for example, pressing the Q key takes the square root of the
number in the Calc line.
Hints
Use BACKSPACE to correct a single keystroke on the Calc line.
Use DEL to erase the entire Calc line and reset it to zero.
To do simple arithmetic
1. Type the calculation in the Calc line.
2. Press ENTER (or the = key).
Your OmniBook’s HP Calculator application starts in algebraic mode, shown by the
letters ALG in the status line. When algebraic mode is active, you can type a number
into the Calc line, then type an arithmetic operator like +, then type another number
and press ENTER or the = key to see the answer.