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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Chinese invent abacus for mathematical calculations. (2 abr 570 ano – 16 jul 570 ano)
Adicionado na linha do tempo:
Major World Events
By
cole bennett
16 out 2018
0
0
479
Data:
2 abr 570 ano
16 jul 570 ano
~ 3 months and 15 days
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