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− | [[File:Abacus.jpg]]
| + | == Abacus == |
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− | == Where to get Abacus ==
| + | Read at https://help.sugarlabs.org/abacus.html |
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− | [http://activities.sugarlabs.org/en-US/sugar/addon/4293/ Activity] | [http://git.sugarlabs.org/projects/abacus/repos/mainline Source] | + | The source file has been moved to [https://github.com/godiard/help-activity/blob/master/source/abacus.rst GitHub] |
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− | == About Abacus ==
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− | [[File:Abacus-icon.png]]
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− | [http://en.wikipedia.org/wiki/Abacus Abacus] lets the learner explore different representations of numbers using different mechanical counting systems developed by the ancient Romans and Chinese. There are several different variants available for exploration: a [http://en.wikipedia.org/wiki/Suanpan suanpan], the traditional Chinese abacus with 2 beads on top and 5 beads below; a [http://en.wikipedia.org/wiki/Soroban soroban], the traditional Japanese abacus with 1 bead on top and 4 beads below; the [http://en.wikipedia.org/wiki/Abacus#Russian_abacus schety], the traditional Russian abacus, with 10 beads per column, with the exception of one column with just 4 beads used for counting in fourths; and the [http://en.wikipedia.org/wiki/Abacus#Native_American_abaci Nepohualtzintzin], a Mayan abacus, 3 beads on top and 4 beads below (base 20).
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− | <gallery>
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− | File:Suanpan.png|suanpan (Chinese)
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− | File:Soroban.png|soropan (Japanese)
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− | File:Schety.png|schety (Russian)
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− | File:Nepohualtzintzin.png|nepohualtzintzin (Mayan)
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− | </gallery>
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− | [[Category:Activities]]
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