Difference between revisions of "Abacus"
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Revision as of 19:37, 7 March 2014
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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