Sagot :
Réponse :
Explications étape par étape :
Bonjour
Exercice 1: Simplifier
a) (-2)+(-3)+(-4)+(+5)
= -2 - 3 -4 + 5
b) (-1)-(-1)-(+2)-(-3)
= -1 + 1 - 2 + 3
c) (+3)+(+4)-(-5)+(-6)
= 3 + 4 + 5 - 6
Exercice 2: Calculer
a) (-2)+(-5)+(+3)+(-6)
= -2 - 5 + 3 - 6
= -13 + 3
= -10
b) (-1)-(-5)-(+3)
= -1 + 5 - 3
= - 4 + 5
= 1
c) (-3)+(-4)-(-2)
= -3 - 4 + 2
= -7 + 2
= - 5
