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nov 11, 220 BC - Ábaco chino

Description:

Fueron cuentas de cerámica hechas en el occidente de la dinastía Zhou. El ábaco tenía una cuenta en la parte superior y cuatro en el inferior.

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ByDonovan Dementjevas

16 Oct 2018

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365

Date:

nov 11, 220 BC

Now

~ 2248 years ago

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