// todo need optimize like in event.jsp. Add indexing or not indexing this page. Multiplication tables (7 h 50 m, 18 nov 2018 ano – 20 h 53 m, 30 jul 2019 ano) (Linha do tempo)
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Multiplication tables (7 h 50 m, 18 nov 2018 ano – 20 h 53 m, 30 jul 2019 ano)

Descrição:

Until the 1960s, complicated computations were done with the help of mathematical tables.

Adicionado na linha do tempo:

Counting/Caculating Inventions

ByEmily Stark
4 nov 2019

Data:

7 h 50 m, 18 nov 2018 ano
20 h 53 m, 30 jul 2019 ano
~ 8 months
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