Bonjour,
a)
2/7 + 10/21= 6/21 + 10/21 = 16/21
b)
21/21 - 16/21 = 5/21
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Bonjour,
a)
2/7 + 10/21= 6/21 + 10/21 = 16/21
b)
21/21 - 16/21 = 5/21