算盤 Abacus Tutorial - How to use an Abacus. Japanese, Chin...

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算盤 Abacus Tutorial - How to use an Abacus. Japanese, Chinese abacus techniques.

The Bead Unbaffled - Totton Heffelfinger & Gary Flom Abacus is a Latin word meaning sand tray. The word originates with the Arabic "abq", which means dust or fine sand. In Greek this would become ab

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