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What is the abacus

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What is the abacus
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Sia ? 5 years, 1 month ago

The standard abacus can be used to perform addition, subtraction, division and multiplication; the abacus can also be used to extract square-roots and cubic roots. The beads are manipulated with either the index finger or the thumb of one hand.

Asmi Zambre 5 years, 1 month ago

Of course
http://mycbseguide.com/examin8/

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