Bonjour,
Voilà la réponse
G = 4/5+7/5 x 3/1
G = 4/5+21/5
G = 25/5
H = 6/23 + 17/23
H= 23/23
H = 1/1 = 1
I = 5/14+3/7
I = 5/14+6/14
I = 11/14
J = 3/1 + 1/4 - 1/8
J = 12/4+1/4-1/8
J = 13/4-1/8
J = 26/8-1/8
J = 25/8
K = 4/1 x 7/3 + 1/6
K = 28/3 + 1/6
K = 56/6+1/6
K = 57/6 = 19/2
L = 21/4 - 3/4 x 5/1
L = 21/4 - 15/4
L = 6/4 = 3/2