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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

4 nov 2019

0

0

360

Data:

7 h 50 m, 18 nov 2018 ano

20 h 53 m, 30 jul 2019 ano

~ 8 months

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