Bonjour,
Exercice 1 :
PARTIE 1 : 175 -175 = 0 point
PARTIE 2 : -200 + (-50) +150 + 200 = -200 - 50 + 150 +200 = 100 points
PARTIE 3 : 200 - 175 + 125 - 50 = 100 points
Exercice 2 :
1) 3 + (-2) +1 = 3 -2 + 1 = 2
2) 3 - (-2) - 1 = 3 + 2 - 1 = 4
Exercice 3 :
A2 : A1 + B1 car -2 + 17 = 15
B2 : A1 - B1 car -2 -17 = 19
C2 : B1 -A1 car 17 - (-2) = 17 + 2 = 19
