Simplifier, puis calculer chaque expression. A= 5 - ( -7 ) + 2 - 9 B= -15 + 8 - ( -6 ) - 4 + 6 C= - 6 + 4 - ( -3 ) - 6

Question

Mathématiques Publié : 2015-05-15 Mis à jour : 2024-01-18 Flavie20101

Question

Simplifier, puis calculer chaque expression.

A= 5 - ( -7 ) + 2 - 9
B= -15 + 8 - ( -6 ) - 4 + 6
C= - 6 + 4 - ( -3 ) - 6

Answer 1

A = 5 +7 +2 -9
= 14 -9
= 5

B= -15 +8 +6 -4 +6
= -19 +20
= 1

C= -6 +4 +3 -6
= -12 +7
= -5

Answer 2

a = 5 + 7 + 2 - 9 = 14 - 9 = 5

b = - 15 + 8 + 6 - 4 + 6 = 20 - 19 = 1

c = - 6 + 4 + 3 - 6 = 7 - 12 = - 5