You can use an abacus to add and subtract quantities of beads by moving the them around. This can in turn help to solve equations involving counting numbers.
The Chinese abacus
Abacus was invented by the Chinesethe abacus was also known as the first computer
The abacus was originated in China in 3000 B.C.(:
Asiana Abacus was created in 1991.
the abacus is made by the Egyptian in Egypt.
China invented the abacus .
How did the abacus occur?
The Chinese abacus
An Abacus has beads and strings.
ABACUS
it is the abacus. :D :D :D i got is dummies
The abacus II!
the Chinese invented the abacus
the invenor of the abacus is the invenor of me
Abacus was invented by the Chinesethe abacus was also known as the first computer
the antonym for abacus is future calculator
China invented the Abacus.