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Abacus is an ancient mathematical tool used for calculations. It is the first calculating device in the entire universe, even computers has been inven...
Abacus & Mental Arithmetic program helps to enhance mental ability and increase brain function of students. An Abacus is a basic instrument or an ...
An abacus is a calculation tool. It is used to perform a mathematical function. The basic function of a calculation is Addition, Subtraction, Multipli...
An abacus is a calculation tool. It is used to perform a mathematical function. The basic function of a calculation is Addition, Subtraction, Multipli...