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Around 2500BC the first Abacus appeared in Sumaria. It arrived in Persia about 600BC. The Greek Abacus is recorded to have been in use about 500BC
The Chinese abacus
Abacus was invented by the Chinesethe abacus was also known as the first computer
The Chinese abacus was developed about 5000 years ago. It was built out of wood and beads. It could be held and carried around easily. The abacus was so successful that its use spread form China to many other countries. The abacus does not actually do the computing, as today's calculators do. It helps people keep track of numbers as they do the computing.
Nobody knows who was first because they were invented thousands of years ago in Babylon.
The Abacus
well here is the answer ! :)Some people use the abacus to solve some mathematical calculations
An abacus.
abacus (chinese)
During the Achaemenid Persian Empire, around 600 BC the Persians first began to use the abacus but I don't think history has documented it's inventor-someone will correct me or add if I am wrong..
Currently, they do math just like we do math. But they used to use an abacus. Here's the Wiki explanation of it. http://en.wikipedia.org/wiki/Abacus
The abacus.
abacus
Abacus
abacus
Abacus.
abacus