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Old 08-15-2006, 07:14 PM   #67 (permalink)
Granger1814


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Join Date: Oct 2005
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Serena raised her hand, hoping her answer was correct. "The origins of the abacus are disputed, as many different cultures have been known to have used similar tools. However, it is known to have existed in Babylonia and in China, with invention to have taken place between 2400 BCE and 300 BCE."
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