Réponse :
Bonjour
Explications étape par étape
Exercice 8
A = 12 + (5 -9) = 12 -4 = 8
7 - (3 -9) = 7 - (-6) = 7 +6 = 13
(-8 -5)-4 = -13 -4 = -17
-2 - (4 -7) = -2 - (-3) = -2 +3 = 1
-4 - (8 -12) = -4 - (-4) = -4 +4 = 0
(-4 -8) -12 = -12 -12 = -24
-4 - (8 +12) = -4 - (20) = -4 -20 = -24
10 + ( -10 -12) - (-8 +3) = 10 + (-22) - (-5) = 10 -22 +5 = -7
