Bonjour,
14)
E = 6/11 + 4/11
E = 10/11
F = 8/9 - 13/9
F = - 5/9
G = - 3/10 + 7/10
G = 4/10
G = (2 x 2) / (2 x 5)
G = 2/5
H = - 1/12 - 7/12
H = - 8/12
H = (4 x - 2) / (4 x 3)
H = - 2/3
16)
M = 7/8 - 1/12
M = (7 x 3) / (8 x 3) - (1 x 2) / (12 x 2)
M = 21/24 - 2/24
M = 19/24
N = - 4/9 + 5/12
N = (- 4 x 4) / (9 x 4) + (5 x 3) / (12 x 3)
N = - 16/36 + 15/36
N = - 1/36
P = - 7/6 - 5/3 + 2/9
P = (- 7 x 3) / (6 x 3) - (5 x 6) / (3 x 6) + (2 x 2) / (9 x 2)
P = - 21/18 - 30/18 + 4/18
P = - 47/18
Q = (4/3 + 2/15) - (3/4 - 1/8)
Q = [(4 x 5) / (3 x 5) + 2/15] - [(3 x 2) / (4 x 2) - 1/8]
Q = (20/15 + 2/15) - (6/8 - 1/8)
Q = 22/15 - 5/8
Q = (22 x 8) / (15 x 8) - (5 x 15) / (8 x 15)
Q = 176/120 - 75/120
Q = 101/120.
