tell me what is abacuss

Mathematics
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what is abacuss

May 17th, 2015

Abacus is a counting device. It can be used for arithmetic operations such as addition, subtraction, multiplication and more. It is a calculating tool that was in use centuries before the adoption of the written modern numeral system.

May 17th, 2015

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May 17th, 2015
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May 17th, 2015
May 26th, 2017
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