Sagot :
Réponse :
A= -2+(-10)-2-(-10)
-2-10-2+10 = -4
B= 11-2-(+11)+(-2)
9-13=-4
C= 5+(-10)-(-5)+10-5=
5+5-5-10+10=5
D= (-8)+(-3)-(-8)+11
-8-3+8+11=
-8+8-3+11= 8
Calculer astucieusement ex: 11
A= 15-23+5-7
-23-7+15+5= -30+20=-10
B= -8+16-20-15
16-15-8-20 = 1-28 = -27
C= 56-5+25-40
-5-40+25+56=
-45+25+56=
-20+56 = 36
D= -5+15-30+10
-5+15+10-30=
10+10-30 = -10
Je vous remercie v
Explications étape par étape
Bonsoir,
Calculer astucieusement ex: 9
A= -2+(-10)-2-(-10)
A = - 2 - 10 - 2 + 10
A = - 2 - 2 - 10 + 10
A = - 4
B= 11-2-(+11)+(-2)
B = 11 - 2 - 11 - 2
B = 11 - 11 - 2 - 2
B = - 4
C= 5+(-10)-(-5)+10-5
C = 5 - 10 + 5 + 10 - 5
C = 5 - 5 - 10 + 10 + 5
C = 5
D= (-8)+(-3)-(-8)+11
D = - 8 - 3 + 8 + 11
D = - 8 + 8 - 3 + 11
D= 8
Calculer astucieusement ex: 11
A= 15-23+5-7
A = 15 + 5 - 23 - 7
A = 20 - 30
A = - 10
B= -8+16-20-15
B = - 8 - 20 - 15 + 16
B = - 28 + 1
B = - 27
C= 56-5+25-40
C = 25 - 5 - 40 + 56
C = 20 - 40 + 56
C = - 20 + 56
C = 36
D= -5+15-30+10
D = - 5 + 15 + 10 - 30
D = 10 + 10 - 30
D = 20 - 30
D = - 10.