Question

2) Elimine os parênteses e calcule:
a) ( – 4 ) – ( – 5) + ( + 5 ) =
b) ( + 3 ) – ( + 9 ) + ( – 3 ) – ( – 1 ) =
c) + ( – 3 ) – ( + 1 ) = d) – 3 – ( – 4 ) + 12 – 9 – 3 – 1 – (– 2) =

Answer 1

Resposta:

a) 6

b) - 15

c) - 4

d) 3

Explicação passo-a-passo:

a) (– 4 ) – ( – 5) + ( + 5 ) =

- 4 + 5 + 5

6

b) ( + 3 ) – ( + 9 ) + ( – 3 ) – ( – 1 ) =

- 3 - 9 - 3 + 1

- 15

c) + ( – 3 ) – ( + 1 ) =

- 3 - 1

- 4

d) – 3 – ( – 4 ) + 12 – 9 – 3 – 1 – (– 2) =

- 3 + 4 + 12 - 9 - 3 - 1 + 3

3

Espero ter ajudado

Answer 2

Resposta:

a) 6

b) -2

c) - 4

d) -2

Explicação passo-a-passo:

a)

( – 4 ) – ( – 5) + ( + 5 ) =

( – 4 ) + 5 + ( + 5 ) =

– 4  + 5 + 5  =

– 4  + 10  =

6

b)

( + 3 ) – ( + 9 ) + ( – 3 ) – ( – 1 ) =

3 - 9 - 3 + 1  =

3 - 9 - 4  =

3 - 5 =

-2

c)

+ ( – 3 ) – ( + 1 ) =

- 3 - 1  =

- 4

d)

– 3 + 4 + 12 – 9 – 3 – 1 + 2 =

– 3 + 4 + 12 – 9 – 3 – 3 =

– 3 + 4 + 12 – 9 - 6 =

– 3 + 4 + 12 – 15 =

– 3 + 4 - 3 =

– 3 + 1 =

-2