Réponse :
C = 1-(8+3)/12
C = 1 - 11/12
C =(12-11)/12 = 1/12
D = (6-5)/2 : (5+1)/5
D = 1/2 : 6/5
D = 1/2*5/6
D = 5/12
2) 4/5*35/8 =
1 *7/2 = 7/2
(on simplie 4/8 =1/2 et 35/57)
3) 1/12 + 5/12 + 7/ 2=
6/12 + 7/2 =
1/2+7/2 = 8/2=4
Explications étape par étape
