es que quelquen peut m aider pour l exercice 15 niveau 5 eme c'est sur les fractions svp.

N°15
A = 5 + 3/4
A = 20/4 +3/4 = 23/4

B = 2/3 +4
B= 2/3 + 12/3 = 14/3

C = 2 +2/3
X = 6/3 +2/3 = 8/3

D = 9/2 -3
D = 9/2 -6/2 = 3/2

E = 4 -5/6
E = 24/6 -5/6 = 19/6

F = 17/5 -3
F = 17/5 -15/5 = 2/5