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Abacus and Algorithm: A History of Math
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European abacus counting frame. Calculating... - Stock Illustration [63355071] - PIXTA
An Abacus that has been used over the centuries as a tool or machine to perform
Chinese abacus Cadre de calcul, un outil de calcul qui a été utilisé en Europe, la Chine et la Russie, des siècles avant l'adoption de la système numérique que les écrits. L'origine
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