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Tool: Soroban in Various Number Systems
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Go to: http://www.cut-the-knot.org/Curriculum/Arithmetic/Soroban.shtml (opens a new window)
Description: An interactive Java gadget simulating soroban--the Japanese abacus. Options inlude selecting the number system base and the number of wires. The applet displays the number matching the configuration.
Technology Type: Java Applet 
Author: Alexander Bogomolny
Language: English 
Cost: Does not require payment for use

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