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#5 HAND CALCULATOR by Raymond Blum (and others)

Your friends are amazed when you magically transform your hands into a calculator and multiply on your fingers!

Materials

Pen

Preparation

Draw these calculator keys on your palms with a ballpoint pen.

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Presentation

Tell your friend that she can multiply by 9 on your hands just as she would on a regular calculator. After she enters the numbers and pushes [=] , just bend over the finger that is multiplied by 9. The fingers that are standing up tell her the answer!

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I learned this trick in middle school.  I found it very helpful.   I hope you do to.

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Page by: Mathman (Bruce A. Titen) 1998

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