Pocket Calculator

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This Demonstration simulates a simple pocket calculator.
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Contributed by: Karl Scherer (April 2014)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Decimal point "."
To key in the number 31.5, click the "3" button, then the "1" button, then the "." button, then the "5" button.
Buttons "+", "-", "×", "÷"
Key in the first number, then one of the keys "+", "-" ,"×", "÷", then the second number.
Finally, click "=" to see the result.
Memory signal
The empty square in the top-left corner shows "M" if there is a nonzero number stored in the memory.
Buttons "+", "-", "×", "/" signal
If you have pressed one of the buttons "+", "-", "×", "÷", the button will be marked by a thin black frame to remind you which calculation you are executing.
Shortcut (Brackets denote output by the calculator, all others are your keystrokes.) Instead of 4 × 2 = (8) and then 8 + 3 = (11) you can keep calculating: 4 × 2 = (8) + 3 = (11) ...
Similarly, you can chain calculating exponentials with integral exponent
. In order to calculate
, key in: 5 × 5 = (25) × 5 = (125) × 5 = (625).
Limitations - Avoid number overflow! - Only two decimal places available! - There is no rounding in the multiplication result.
History This game was originally published as the Zillions games "Calculator" by the same author.
Permanent Citation