Réponse :
Explications étape par étape
Bsr,
E:
3-7/5 = 15/5 -7/5 = -8/5
1-9/10 = 10/10 - 9/10 = 1/10
(-8/5)/(1/10) = (-8*10)/ (5*1) = -80/5 = - 16
F
(5/6)/4 = (5*1)/ (6*4) = 5/20 = 1/4
7/-8 +1/4 -1 =
7/-8 + 2/8 -8/8 = 1/- 8 ou -1/8
☺
