The abacus also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system. The abacus is an ancient calculating tool, constructed for the system of powers of ten. Abacus for kids.
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The abacus also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system.
ReplyDeleteThe abacus is an ancient calculating tool, constructed for the system of powers of ten. Abacus for kids.
Best consultants of Abacus Student Kit @brainmatrixx.com. we are best dealers and suppliers for abacus book. for more details visit our website and purchase abacus books online. Abacus Book Dealers
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