Shows how to use the open-end abacus. Discusses the history of the decimal number system and principles of its use, such as grouping in addition, regrouping in subtraction and comparison of number values. Great UNIVAC footage a Man in veil/shawl counting with rocks, kids using abacus/coins/pointer and wooden discs.

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License at http://www.paya.com/videos/287165 Buy this film on DVD.

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