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11
Who invented the abacus?
The Babylonians invented the abacus.
The abacus, the first adding machine, was invented in 3000Bc.
The abacus, the first adding machine, was invented in 3000Bc.
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Source: Usborne Book of Inventors and Inventions.
Source: Usborne Book of Inventors and Inventions.
Flashcard info:
Author: CoboCards-User
Main topic: Social Science
Topic: Inventors and Inventions
School / Univ.: University of Albany
City: New York
Published: 24.03.2013