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Answer

Abacus is an ancientr calculating device invented in china for calculations

Answer

Mainly China is origion of Abacus

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IT was invented by CHINA

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Abacus was invented by china.500B.C.

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Abacus was invented by china
Answer
Abacus was invented by china.500B.C.
Answer
Abacus was invented by china
Answer
the abacus we use today is chinese abacus , founded by chinese people in 500B.C

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