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Line 1: − [[File:Abacus.jpg]]+ − == Where to get Abacus == + − + − − == About Abacus == − − [[File:Abacus-icon.png]] − − − [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). − − <gallery> − − File:Suanpan.png|suanpan − File:Soroban.png|soropan − File:Schety.png|schety − File:Nepohualtzintzin.png|nepohualtzintzin − − </gallery> − − [[Category:Activities]]
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== Abacus ==
Read at https://help.sugarlabs.org/abacus.html
[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]