Réponse :
M = 7/8 - 1/12
M = 21/24 - 2/24
M = 21-2/24
M = 19/24
N = -4/9 + 5/12
N = -16/36 + 15/36
N = -16+15/36
N = -1/36
P = -7/6 - 5/3 + 2/9
P = -7/6 - 10/6 + 2/9
P = -7-10/6 + 2/9
P = -17/6 + 2/9
P = -102/36 + 8/36
P = -102+8/36
P = -94/36
P = -47/18
Q = (4/3 + 2/15) - (3/4 - 1/8)
Q = (20/15 + 2/15) - (12/16 - 2/16)
Q = (20+2/15) - (12-2/16)
Q = 22/15 - 10/16
Q = 352/240 - 150/240
Q = 352-150/240
Q = 202/240
Q = 101/120
