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abacus

An abacus is a manual aid to calculating that consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame. The abacus itself doesn't calculate; it's simply a device for helping a human being to calculate by remembering what has been counted. The modern Chinese abacus, which is still widely used in China and other countries, dates from about 1200 A.D. It is possible that it derives from the earlier counting board s used around the Mediterranean as early as 300 B. C. An Aztec version of an abacus, circa 900-1000 A.D., is made from maize (corn) threaded through strings mounted in a wooden frame.

There are Japanese and Russian versions of the abacus and several modern "improved" versions.

This was last updated in November 2010

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my kid is not interested in abacus.he is 8years old and now he is in 4th level .he is finding it difficult to do the sums mentally but he is doing it well with the abacus board .what can i do to develop his interest? kindly reply me

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