Question

1. Efetue as seguintes operações:

a) – 2 + 4 – 9 + 4 + 9 – 10 =
b) 12 – 8 + 1 + 8 =

c) 15 – 6 + 0 – 3 – 7 – 1 =
d) – 6 – 4 – 2 – 1 + 0 – 15​

Answer 1

a) – 2 + 4 – 9 + 4 + 9 – 10 =

2 – 9 + 4 + 9 – 10 =

-7 + 4 + 9 – 10 =

-3 + 9 – 10 =

6 – 10 =

- 4

b) 12 – 8 + 1 + 8 =

4 + 1 + 8 =

5 + 8 =

13

c) 15 – 6 + 0 – 3 – 7 – 1 =

9 + 0 – 3 – 7 – 1 =

9 – 3 – 7 – 1 =

6 – 7 – 1 =

- 1 – 1 =

- 2

d) – 6 – 4 – 2 – 1 + 0 – 15 =

- 10 – 2 – 1 + 0 – 15 =

- 12 – 1 + 0 – 15 =

- 13 + 0 – 15 =

- 13 – 15 =

- 28

Espero ter ajudado :)