Bonjour! Je vais essayer a t'aider! :)
A = 1/2 - 1/6
A = 1*3/2*3 - 1/6
A = 3/6 - 1/6
A = 3-1/6
A = 2/6
B = 7/2 - 5/4
B = 7*2/2*2 - 5/4
B = 14/4 - 5/4
B = 14-5/4
B = 9/4
C = 5/9 - 1/3
C = 5/9 - 1*3/3*3
C = 5/9 - 3/9
C = 5-3/9
C = 2/9
D = 13/2 - 1/4
D = 13*2/2*2 - 1/4
D = 26/4 - 1/4
D = 26 - 1/4
D = 25/4
E = 10/18 - 1/6
E = 10/18 - 1*3/6*3
E = 10/18 - 3/18
E = 10-3/18
E = 7/18
F = 7/3 - 13/15
F = 7*5/3*5 - 13/15
F = 35/15 - 13/15
F = 35-13/15
F = 22/15
G = 7 - 20/3
G = 21/3 - 20/3
G = 21-20/3
G = 1/3
H = 27/4 - 6
H = 27/4 - 24/4
H = 27 - 24/4
H = 3/4
I = 17/7 - 2
I = 17/7 - 14/7
I = 17-14/7
I = 3/7
J = 23 - 308/14
J = 322/14 - 308/14
J = 322 - 308/14
J = 14/14
J = 1
Voila! J'espere t'avoir aide! :)
