Réponse :
A=5/2 x -7/3= -35/6
B=-7x8/5 = -56/5
C= -3/7 x14/-5 = 42/35= 6/5
D= 7/6 - (-1/2+1/3) = 7/6 + 1/6 = 8/6
E= 1- 3/4x2/3 = 1- 1/2 = 1/2
F= 5/3x (2/3+1/5) = 5/3x13/15 = 13/9
G= 1/2 x (2/3x600) = 1/2x400 = 200g=20mg
H=1/3:5/4 = 1/3 x 4/5 = 4/15
I= 9 x 7/21 = 3 km
J= 1/6 + 3/4 + 7/9 = 11/12 + 7/9 = 61/36
Explications étape par étape :
