Bonjour quelqu’un pourrait m’aider svp merci

Réponse:

Exercice 9 :

A=3-(-4+5)+(6-9)

=3-1+(-3)

=2-3

-1

B=1-(2-3)-(4-5)

=1-(-1)-(-1)

=1+1+1

=3

C=2-[1-(2+4)]

=2-(1-6)

=2-(-5)

=2+5

=7

D=[2-(-2)]-[2-(-4)]

=(2+2)-(2+4)

=4-6

=-2

E=-5-10-[-8-(4-3)]

=-5-10-(1-8)

=-5-10-7

=-15-7

=-22

F=-(-8+4)-[-13-(5-11)]

=-(-4)-(-13-6)

=4-(-19)

=4+19

=23

G=2-(-3-2)+(4-7)-[4-(-3)]

=2+5-3-7

=-3

Exercice 12 :

A=a-(b-c)+d

=-2-(3-(-1))-3

=2-4-3

=-5

B=-a-b-(c-d)

=-(-2)-3-(-1-(-3))

=2-3-(+2)

=2-3-2

=-3

Exercice 10 :

1°) 7-(8+2)=-3

7-10=-3

-3=-3

2°) -11+5-(2+4)=-12

-11+5-6=-12

=-11-1=-12

-12=-12

3°) -(100-100)-(1000-1000)=0

-0-0=0

0=0