How to multiply without calculator

Multiplying multiple digits made easy with this Japanese math trick

This fun mathematics video shows you how to multiply 2 digit numbers by 2 digit numbers without a calculator and is based on a graphic Japanese math trick.Try it yourself and be surprised how easy 2 digit multiplication can be.

This video is great as a teaser in math class and can be used by teachers and parents to motivate math students. A kind of positive reinforcement for math education.

How does it work? Very simple actually: for all the digits in a multiplication sentence you'll need to draw parallel lines and once done just count the crossings. It's really that simple.

Written by Willy Wonka

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