Réponses

Meilleure réponse !
2014-09-07T14:05:05+02:00
Bonjour

A = -7/4 x 11/9 = - 77/36
B = 15 x 14/35 = 210/35 = 6
C = 24/-35 x -42/36 = - 1008/-1260 = 4/5

A = 6/7 : 9/5 = 6/7 x 6/9 = 36/63 = 4/7
B = 15/8 : -6 = 15/8 x - 1/6 = - 15/48 = 5/16
C = 12/35 : 8/21 = 12/35 x 21/8 = 252/280 = 9/10
D = -18 : 27/-8 = -18 x -8/27 = 144/27 = 16/3

2014-09-07T14:06:30+02:00
Voici pour le premier exercice :
A=-7/11 * 11/9 = -77/36
B=15 * 14/35 = 210/35 = 42/7 = 6/1
C=24/-35 *-42/36 = 1008/-1260 = 4/5