Question

Calcule as expressões a seguir: a) – 7 – 8 + 9 + 4 – 2 + 10 – 1 =
b) +2 + (- 1) –(+3) + (+2) – (-4) =
c) +4 – 8 – 2 +12 +1 – 4 – 3 + 3 =
d) - 4 + (- 4) – (- 3) – (+2) + (+5) =

Answer 1

Resposta:

a) 5

b) 12

c) 2

d) 2

Explicação passo-a-passo:

a) – 7 – 8 + 9 + 4 – 2 + 10 – 1

- 15 + 9 + 2 + 9

- 6 + 11

5

b) +2 + (- 1) –(+3) + (+2) – (-4)

2 - 1 + 3 + 2 + 4

3 + 3 + 2 + 4

6 + 6

12

c) +4 – 8 – 2 +12 +1 – 4 – 3 + 3

4 - 10 + 12 - 7 + 3

- 6 + 5 + 3

-6 + 8

2

d) - 4 + (- 4) – (- 3) – (+2) + (+5)

- 4 - 4 + 3 + 2 + 5

- 8 + 5 + 5

- 8 + 10

2