Bonjour
A = 1/2 - 1/3
A = (1 x 3) / (2 x 3) - (1 x 2) / (3 x 2)
A = 3/6 - 2/6
A = 1/6
B = - 14/32 :(- 42/8)
B = - 14/32 x (- 8/42)
B = 112/1 344
B = (112 x 1) / (112 x 12)
B = 1/12
C = - 2/5 x 10/4 x - 7/21
C = - 20/20 x - 7/21
C = - 1 x - 7/21
C = 7/21
C = (7 x 1) / (7 x 3)
C = 1/3
D = 5 x 3/10
D = 15/10
D = (5 x 3) / (5 x 2)
D = 3/2
E = - 5 + 2/3
E = (- 5 x 3) / (1 x 3) + 2/3
E = - 15/3 + 2/3
E = - 13/3
F = 2/5 + 2/6
F = (2 x 6) / (5 x 6) + (2 x 5) / (6 x 5)
F = 12/30 + 10/30
F = 22/30
F = (2 x 11) / (2 x 15)
F = 11/15.
