Je pressier / = barre de fraction ♥ 1 développer chaque expression puis calculer ♥
a) = 15/7 x (14/3 + 21/5)
b) = 14/11 x (33/2 - 22/2)

2) factoriser chaque expression puis calculer
a) 4/5 x 2/3 + 2/15 x 2/3
b) 7/3 x 3/4 - 3/4 x 5/9
MERCI D'AVANCE JE VOUS AIMES ♥♥♥♥
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