Réponse :
A = 7/5 - (7/11 : 5/3) = 7/5 - (7/11 X 3/5) = 7/5 - 21/55 = 77/55 - 21/55 = 56/55
B = (1 + 4/3) X 5 = (3/3 + 4/3) X 5 = 7/3 X 5 = 35/3
C = 1/2 - 2/3(2 - 7/2) = 1/2 - 2/3(4/2 - 7/2) = 1/2 - 2/3(-3/2) = 1/2 + 6/6 = 3/6 + 6/6 = 9/6 = 3/2
D = (1/2 - 2/3) : (2/3 - 3/2) = (3/6 - 4/6) : (4/6 - 9/6) = - 1/6 : - 5/6 = -1/6 X -6/5 = 6/30 = 1/5
Explications étape par étape
