Bonjour
A = - 5/6 +1/8
A = (- 5 x 4) / (6 x 4) + (1 x 3) / (8 x 3)
A = - 20/24 + 3/24
A = - 17/24
B = - 11/8 x - 6/5
B = 66/40
B = (2 x 33) / (2 x 20)
B = 33/20
C = - 7/6 : 5/- 9
C = - 7/6 x - 9/5
C = 63/30
C = (3 x 21) / (3 x 10)
C = 21/10
D = 7 x - 2/5 x 15/26
D = - 14/5 x 15/26
D = - 210/130
D = (10 x - 21) / (10 x 13)
D = - 21/13.
