Question

1) efetue:

A) 7-(4-8) =

B) -2 - (-13+8) =

C) 1- [1- (2-2)] =

D) 1 - [1 - (2-4)] =

me ajudem pfvr​

Answer 1

a)

7 - (4 - 8)

7 - 4 + 8

7 + 4

11

b)

- 2 - (-13 + 8)

-2 + 13 - 8

13 - 10

3

c)

1 - [1 - (2 - 2)]

1 - [1 - 2 + 2]

1 - 1 + 2 - 2

0

d)

1 - [1 - (2 - 4)]

1 - [1 - 2 + 4]

1 - 1 + 2 - 4

- 2