Réponses

2014-01-19T13:48:07+01:00


A= 3/4(2/5 + 3/2)

A= 6/20 + 9/8

A= 12/40 + 45/40

A= 57/40

B= 4/5 x 8/7 - 5/7 x 4/5

B= 32/35 - 4/7

B= 32/35 - 20/35

B= 12/35