They are made of bamboo and beans or stones.
It was made in 1815
For a calculater
The Chinese abacus.
the history about the abacus is that 3000 years ago the chinese invented the abacus. The abacus was made of wood parrelel rod and beads.
the chinese and they made the wheel barrow
The Chinese abacus
abacus the Chinese invented it
abacus was not invented by chinese, but by babylonians.
the Chinese invented the abacus
chinese are white and japanese are short
The Ancient Chinese made the first means for counting with the abacus.
The Chinese are probably the first , but the Romans made them maybe 100 years later.