Sagot :
Bonjour
Calculer ces expressions en détaillant
a=3+(-9)-(-7)-6
a = 3 - 9 + 7 - 6
a = - 9 - 6 + 3 + 7
a = - 15 + 10
a = - 5
b=-8+5-3-7+15
b = - 8 + 5 + 15 - 3 - 7
b = 20 - 18
b = 2
c=12-(3-7+2)
c = 12 - (5 - 7)
c = 12 - (- 2)
c = 12 + 2
c = 14.
Bjr,
3 - 9 + 7 - 6 = - 6 + 7 - 6 = - 12 + 7 = - 5
- 8 + 5 - 10 + 15 = - 18 + 20 = 2
12 - (- 4 + 2) = 12 - (-2) = 12 + 2 = 14