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How was the calculator invented?

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โˆ™ 2010-01-15 15:53:05

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In the ninth century, the Chinese used an abacus to calculate numbers. It used beads strung on sticks to manually add.

French mathematician Blaise Pascal invented an adding machine in 1642 that used gears to add numbers.

The first successful adding machine was invented in 1886 by William Burroughs; it cost $475.

The first handheld calculator was invented by Texas Instruments in 1966.

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โˆ™ 2010-01-15 15:53:05
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