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1 giug 1557 anni - The equals sign was invented by a welsh author. he was named Robert Recorde.
Aggiunto al nastro di tempo:
10 important events in mathematics
By
Lil Thompson
7 feb 2018
0
0
361
Data:
1 giug 1557 anni
Adesso
~ 467 years ago
Immagini:
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