Russian Abacus (14 h 39 min, 21 nov 2018 ans – 14 h 49 min, 1 juill. 2019 ans)
Description:
The Russian abacus is also called a schoty. It came into use in the 1600s and little is known about how it came to be. It was specifically designed for counting rubles and kopeks.Thee design uses a set of framed rods and a series of beads that are moved back and forth across the rods to conduct the count.
Ajouté au bande de temps:
Date:
14 h 39 min, 21 nov 2018 ans
14 h 49 min, 1 juill. 2019 ans
~ 7 months