Revision as of 22:06, 22 January 2015 by WoweeG (talk | contribs)

The abacus is a manual calculator that can do addition, subtraction, multiplication, division, square roots and cube roots. Where the abacus originated is a question not fully answered. To the experienced operator the abacus is a blazing fast calculator. The abacus is still widely used in rural parts of China and Japan.

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