bonjour
-32/28 = - 8/7 et -1.143
4/9 et 7/6 deviennent : 8/18 et 21/18
28 x 15 = 21 x 20 donc 28/21 = 20/15
-5/6 + 3/8 = - 20/24 + 9/24 = - 11/24
5/7 - 2/3 = 15/21 - 14/21 = 1/21
9/2 x - 7/3 = - 63/6 = - 21/2
- 5 + 1/5 = - 5/5 + 1/5 = - 4/5
l'inverse de - 4/3 est - 3/4 ou - .0.75
le quotient 5/8 : - 10/7 = 5/8 x - 7/10 = - 32/80 = -2/5
4/3 : 5 = 4/3 x 1/5 = 4/15
