Bonjour :)
Réponse en explications étape par étape :
# Exercice 17 : On donne : " a = - 2 " ; " b = 4 " ; " c = 3 " ; " d = - 1 " :
- Questions :
a. Calculer " A = a - b + c - d " :
A = a - b + c - d
A = (- 2) - (+ 4) + (+ 3) - (- 1)
A = - 2 - 4 + 3 + 1
A = - 6 + 4
A = - 2
b. Calculer " B = a - (b + c) - d " :
B = a - (b + c) - d
B = (- 2) - (4 + 3) - (- 1)
B = - 2 - 7 + 1
B = - 9 + 1
B = - 8
c. Calculer " C = (b - a) - (c + d) " :
C = (b - a) - (c + d)
C = (4 - (- 2)) - (3 + (- 1))
C = (4 + 2) - (3 - 1)
C = 6 - 2
C = 4
Voilà
