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Sagot :

Bonjour

2/3 + 8/18 = 12/18 + 8/18

car 2/3 = (2 x 6) / (3 x 6) = 12/18

12/18 + 8/18 = 20/18 = (2 x 10) / (2 x 9) = 10/9.

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