[OLPC Bolivia] [Sur] [somos-azucar] Calculadoras Incas

[Jorge Teran]

After reading the information posted, and doing some research, I found 
some papers that say the Yupana is ab base 40 numbering system. The 
docments that were referenced in the list show the Yupana as a base 10 
numbering system and the methods described lfor arithmetic ook like 
different abacus with the similar arithmetic algorithms.

The paper yupana_como_herramienta_pedagogica.pdf has a clear way of 
explaining the arithmetic operations but it is not clear why the 
numbering 1,2,3,5.


Does any one knows a a reference that could help make this ideas clear.

Regards

M.Sc.Jorge Teran P.
Email: teranj en acm.org
Universidad Mayor de San Andres




On 05/02/12 11:31, Manuel Quiñones wrote:
> El día 5 de febrero de 2012 11:22, Walter Bender
> <walter.bender en gmail.com>  escribió:
>> There is now a Yupana Sugar activity. Please see:
>>
>> http://activities.sugarlabs.org/en-US/sugar/addon/4533/
>>
>> and
>>
>> http://wiki.sugarlabs.org/go/Activities/Yupana
>>
>> Comments/suggestions welcome.
> Walter this is great!
>
> What about adding a gradient to the dots?  Mockup here:
>
> http://dev.laptop.org/~manuq/yupana_mock.png
>
>> regards.
>>
>> -walter
>>
>>
>> --
>> Walter Bender
>> Sugar Labs
>> http://www.sugarlabs.org
>>
>>
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>
>