Question

1. Calcule o valor das expressões.
a) 12-(-3)+(-1)-(-7) ?
b) –5+(-2)-6-(-8)
c) (-4+7-1)-(-2-4-6)
d) (7-10)+(10 – 7)-(-10-7)​

Answer 1

Resposta:

a) 12+3-1+7

15+6

21

b) -5-2-6+8

-7-6+8

-13+8

-5

c) (+2)-(-12)

+2+12

+14

d) (-3)+(+3)-(-17)

-3+3+17

17

Answer 2

Resposta:

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

15+6

21

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

-7 - 2

-5

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

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

2+12

14

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

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

-3+ 3+17

0+17

17