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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 |
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:33, 11 April 2008 | | 517 × 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 |
File usage
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