The Stephenson Abacus(TM)

The line-abacus was developed in ancient Mesopotamia and used by the Babylonians, Egytptians, Greeks, Romans, and Middle Ages Europeans. It is more powerful than constrained bead abaci and was developed first.

 

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Material Type
Activity
Tags
abacus  line-abacus  ancient-computers 
Target Group (Age)
11 – 14
Language
English (United States)
 
 
GeoGebra version
4.2
Views
1717
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