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Blaise Pascal, a French scientist and mathematician, invented the Pascaline in 1642 when he was 18 years old. The pascaline is a numerical wheel calculator which had 8 movable dials that added up to eight figured long sums and used base ten. When the fist dial (the ones column) moved ten notches, the second dial moved one (the ten's column). When the second dial moved ten notches, the third dial (the hundreds column) moved one and so on and so forth.

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15y ago

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