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latest #indroductiontoabacus created topics on internet
kashaf.hassan
knowledge
2018-01-30 09:28
History of Greek Abacus
A tablet found on the Greek island Salamis in 1846 dates back to 300 B.C.E., making it the oldest counting board discovered so far. It is a slab of white marble 149 cm long, 75 cm wide, and 4.5 cm thick,
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