Réponses

2014-04-30T12:00:55+02:00
Salut :)

A = 3/5+2/7*14/15 
A = 3/5 + 2*7*2/7*15
A = 3/5 + 4/15
A = 9/15 + 4/15
A = 13/15
 
B = (1+3/4) / (2-1/8)

B = (4/4 + 3/4) / (16/8 - 1/8)
B = 7/4 / 15/8
B = 7/4 x 8/15
B = 7*4*2/4*15
B = 14/15

J'espère t'avoir aidé(e) ! :)