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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Chinese invent abacus for mathematical calculations. (2 abr 570 año – 16 jul 570 año)
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Major World Events
By
cole bennett
16 oct 2018
0
0
479
fecha:
2 abr 570 año
16 jul 570 año
~ 3 months and 15 days
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