2 Calculer les sommes suivantes.
a.(+3)+(+12)
b. (+7)+(-11)
c. (-5)+(+17)
d. (-8) + (-7)
a.(+3)+(+12)
b. (+7)+(-11)
c. (-5)+(+17)
d. (-8) + (-7)
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Verified answer
Réponse:
à.(+15)
b.(-4)
c.(+12)
d.(-15)
Verified answer
Réponse:
A=15
B=-4
C=12
D=-15
Explications étape par étape:
+ + = +
- - = -
+ - = -
- + = -