Bonsoir '
a) 2/3 (2 + 3/4)
2/3 ( 2x4/1x4 + 3/4)
2/3(8/4+3/4) = 2/3(11/4)
2/3 x 11/4 = 22/12 = 11/6
b) 2/3 + 3 + 3/4 =
Dénominateur commun 12 :
2x4/3x4 + 3x12/1x12 + 3x3/4x3
8/12 + 36/12 + 9/12 = 53/12
Bon courage.
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Bonsoir '
a) 2/3 (2 + 3/4)
2/3 ( 2x4/1x4 + 3/4)
2/3(8/4+3/4) = 2/3(11/4)
2/3 x 11/4 = 22/12 = 11/6
b) 2/3 + 3 + 3/4 =
Dénominateur commun 12 :
2x4/3x4 + 3x12/1x12 + 3x3/4x3
8/12 + 36/12 + 9/12 = 53/12
Bon courage.