Which early mathematician built one of the first mechanical devices to automate the process of addition?

Blaise Pascal

Explanation: For years historians considered the inventor of the first mechanical calculator to be the French mathematician, philosopher, and apologist Blaise Pascal (1623-1662). To assist his father's work as a tax collector, the 19-year-old Pascal created a mechanical device that performed simple addition and subtraction.

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a

explanation:

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