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