Réponse :
bonjour
E = - 48/49 * -56/-64
E = - 48/49 * - 7/-8
E = - 336/392
E = 6 / 7
F = 18/35 : 27/40
F = 18/35 x 40/27
F = 720/945
F = 16/21
G = 3/4 + 35/40
= 30/40 + 35 /40
= 65/40
= 13/8
H = ( 9/12 - 10/12 ) x 15/2
H = - 1 /12 x 15/2
H = - 15/24 = - 5 /8
I = ( 5/5 - 3 /5 ) x ( 5/5 - 3 /5 )
I = 2/5 x 2/5 = 4/25
Explications :
