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selmalakhneche

Réponse :

a)  3x2/3x4 + 5/8 = 5/8 + 6/8 = 11/8

b)  3x3/4x3 + 7/12 = 9/12 + 7/12 =  16/12 = 4/3

c)  5/16 - 1x2/8x2 = 5/16 - 2/16 = 3/16

d)  7x3/5x3 - 4/15 = 21/15 - 4/15 = 17/15

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