Question

the first calculating device______​

Answer 1

Answer:

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An abacus is considered one of the first calculating devices invented by man. It is a manual device which takes time and a great deal of experience to master. An abacus uses several rows of beads to represent numbers; each row stands for a place value and the arrangement of beads in a row stands for a digit.

Answer 2

Answer:

Abacus

One of the first calculating devices made by man is called an abacus. It is a manual device that takes time and a great deal of learning experience. To reflect numbers, an abacus utilizes many rows of beads; every row stands for a place value and a digit stands for the arrangement of beads in a row.

In 1642, Blaise Pascal, a 19-year-old Frenchman, created the first mechanical calculating device. The device from Pascal utilized gears and could add and subtract. In mechanical calculators constructed over the next several hundred years, Pascal’s gear system was commonly used.