Thursday, February 26, 2015

Using an Abacus to do "Real Math"

This video shows Abi using an abacus and a magnetic number board to solve a multi-digit addition problem.

Briefly, the method for teaching this skill is to teach skip-counting on the abacus for each number so the student learns to add each number, making "change" the correct way. For example to add eight, you can put in ten and take out two. Each of these facts needs to be memorized. Once these are mastered, the abacus becomes a very useful tool, as evidenced by math in Japanese schools.

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