Réponse :
Bonjour,
a. 1/6 - 1/10 -------- 5/30 - 3/30 = 2/30 = 1/15
b. 6/35 x 14/9 = 6 x 14 = 84 35 x 9 = 315 = 84/315 = 4/15
c. 5/6 + 5/14 = 35/42 + 15/42 = 50/42 = 25/21
d. 24/9 x 55/88 = 24 x 55 = 1320 9 x 88 = 792 = 1320/792 = 5/3
Explications étape par étape :
