Question

Calcule o valor das expressões.

Answer 1

a) 12-(-3)+(-1)-(-7)

12+3-1+7

21

b) -5+(-2)-6-(-8)

-5-2-6+8

-5

c) (-4+7-1)-(-2-4-6)

2+12

14

d) (7-10)+(10-7)-(-10-7)

-3+3+3

3