File:Abacus Base Five Ten.PNG

Abacus_Base_Five_Ten.PNG(517 × 246 pixels, file size: 86 KB, MIME type: image/png)

Summary

Description This is the small abacus of Al-Khwārizmī abacus with base-five/ten. All upper beans have the five values, and all down beans has the ten values. Hypothetically, this kind of abacus was used on the paleography of modern numerals. It is assumed to have originated because humans have ten fingers.
Date born around 780 and died around 850
Source http://en.wikipedia.org/wiki/Muhammad_ibn_Musa_al-Khwarizmi
Author Al-Khwārizmī

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current00:33, 11 April 2008Thumbnail for version as of 00:33, 11 April 2008517 × 246 (86 KB)Robertolyra{{Information |Description=This is the small abacus of Al-Khwārizmī abacus with base-five/ten. All upper beans have the five values, and all down beans has the ten values. Hypothetically, this kind of abacus was us
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