Réponse :
bonjour
A = 5 - 12 - 8 + 7 + 6 - 4 - 13
= 18 - 37 = - 19
B = 4.3 - 1.7 + 0.2 - 9.5 + 7.2 + 3.6
= 15.3 - 11.2 = 4.1
C = 7.2 - 1.8 + 5 + 6.1 + 8.9 + 3
= 12.4 - 1.8 = 10.6
D = 2.3 - 1.9 + 57 - 6.7 - 1.4 + 8.1 - 57 + 9 - 13.2
= 76.4 - 80.2 = 3.8
E = 6 - 2.3 + 7 + 5 - 9.8 + 3 - 2
= 25 - 14.1 = 10.9
F = 0
Explications étape par étape :