Question

was the first mechanical device used for calculation

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Answer 1

Answer:

An abacus is considered one of the first calculating devices invented by man. ... The first mechanical calculating machine was invented in 1642 by Blaise Pascal, a 19-year-old Frenchman. Pascal's machine used gears and could add and subtract.

Answer 2

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Abacus was the first mechanical device used for calculation...

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