Réponse :
Explications étape par étape
Bonjour
D = - 7/5 × (3 - 8/21)
D = -7/5 x [(3 x 21)/21 - 8/21]
D = -7/5 x (63/21 - 8/21)
D = -7/5 x 55/21
D = -55/5 x 7/21
D = (-11 x 5)/5 x 7/(3 x 7)
D = -11 x 1/3
D = -11/3
E = 5/3 × 3/5 - 16/45 × 35/8
E = 5/5 x 3/3 - (16/8 x 35/45)
E = 1 - [(2 x 8)/8 x (7 x 5)/(9 x 5)]
E = 1 - (2 x 7/9)
E = 9/9 - 14/9
E = -5/9
F =5/7 - 2/7 (1 - 3/4)
F = 5/7 - 2/7(4/4 - 3/4)
F = 5/7 - 2/7 x 1/4
F = 5/7 - 2/4 x 1/7
F = 5/7 - 1/2 x 1/7
F = 10/14 - 1/14
F = 9/14
G =(2 - 1/3) ÷ (5 + 5/6)
G = (6/3 - 1/3) : (30/6 + 5/6)
G = 5/3 : 35/6
G = 5/3 x 6/35
G = 5/35 x 6/3
G = 1/7 x 2
G = 2/7
