Réponses

2014-09-22T21:21:05+02:00
2014-09-22T22:22:36+02:00
Bonsoir

a = - 15/21 + 4/21 = - 11/21
b = 5/72 - 8/72 = - 3/72 = - 1/24
c = 2/24 = 1/12
d = - 7/9 x -14/6 = 98/54  = 49/27
e =1/6 + 7/12 = 2/12 + 7/12 = 9/12 = 3/4