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jan 1, 3498 BC - L'Àbac

Description:

Un àbac és un artefacte que serveix per efectuar operacions aritmètiques senzilles (sumes, restes i multiplicacions). Consisteix en un quadre de fusta amb barres paral·leles per on corren boles movibles, útil també per ensenyar aquests càlculs simples.

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Eix cronològic

Bypaula
30 Sep 2022
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267

Date:

jan 1, 3498 BC
Now
~ 5528 years ago

Images:

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