This is cool, especially if you miss the old calculator tape that used to come out of the machine. QuickBooks has its own calculator (click Edit | Use Calculator), but it’s more fun to use the QuickMath Calculator.

    • Click inside the field where you want to calculate (say, the amount field on a check).
    • Press = and a mini-tape will appear.
    • Type the numbers you want to calculate, followed by the appropriate sign (+, -, /, *, or =).
    • Click C once to clear an entry, twice to clear the tape.
    • Press Esc to cancel.