Bonjour aidez moi svp merci c l’exerci 3

Exercice 1:
A = (-15) + (-7) = -15 - 7 = -22
B = (-11) + (+9) = -11 + 9 = -2
C = (+5) - (+10) = 5 - 10 = -5
D = (-12) - (-13) = -12 + 13 = 1
Exercice 2:
E = -25 + 88 - 15 + 12
= -25 - 15 + 88 + 12
= -40 + 100
= 60
F = -9 - 9 + 9 - 9
= -18 + 0
= -18
G = -22 - (-9 + 3) + (15-30)
= -22 - (-6) + (-15)
= -22 + 6 - 15
= -16 - 15
= -31
H = - (30 - 45) + 20 + (12 - 18 - 2)
= - (-15) + 20 + (12 - 20)
= 15 + 20 + (-8)
= 35 - 8
= 27
Exercice 3:
Carré A non magique car
8+11-6 = 13
8+5+2 = 15
Carré B non magique car
8+11-4 = 15
8+5-2 = 11
Carré C magique car
8+11-4 = 15
-7+5+17 = 15
14-1+2 = 15
8-7+14 = 15
11+5-1 = 15
-4+17+2 = 15
8+5+2 = 15
14+5-4 = 15