1 Jan 300 Jahr v. Chr. - Abacus (300 B.C.-1200 A.D.)

Beschreibung:

The abacus is a device that dates back from 300 B.C.-1200 A.D. , it has beads/disks that can move up or down in order to help people what they’re calculating.

Zugefügt zum Band der Zeit:

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