Bonjour,
A = 1/3 x 4/5
A = 4/15
B=2,2 x (-3/5)
B = -6,6/5
B = -66/50
C = -10/3 × (-5/7)
C = 50/21
D = (-8) × 3/4 × 5/7
D = -8/4 x 3 x 5/7
D = -2 x 15/7
D = -30/7
E = 2/15 × (-13/7)
E = -26/105
F = 1,2 × 3/25
F = 3,6/25
F = 36/250
F = 18/125
G= 7/8 × (-3) × 5/4
G = -105/32
H = 2/3 × (- 3/2) × 1/2
H = 2/2 x -3/3 x 1/2
H = -1/2