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1 h 48 min, 1 janv. 500 ans av. J.-C. - Abacus- a counting frame used by many countries before the Hindu and Arabic numeral system. Used For addition, subtraction and simple equations
Ajouté au bande de temps:
20 oct. 2017
0
0
490
skurka class
Date:
1 h 48 min, 1 janv. 500 ans av. J.-C.
Maintenaint
~ Il y a 2526 ans
Les images:
