Question

Calcule o valor das expressões abaixo: a) (–14) + (– 8) + (– 43) + (– 22) + 0 + 22 + 8 + 43 + 14 = b) 7 – (– 6) – (– 8) = c) – 8 + (– 6) – (+3) = d) 5 – 6 – (+7) + 1 = e) –21 – 7 – 6 – (–15) – 2 – (–10) = f) –28 + 7 + (+12) + (–1) – 6 = g) 10 – (–8) + (–9) – (–12) – 6 + 5 = h) 18 – (–5 – 2 – 3) = i) 35 + (–3) – (–4 + 7 + 2) = j) 8 + (3 – 10) – (3 + 5 – 10) =

Answer 1

Resposta:

Explicação passo-a-passo:

a)

(–14) + (– 8) + (– 43) + (– 22) + 0 + 22 + 8 + 43 + 14 =

- 14 - 8 - 43 - 22 + 0 + 22 + 8 + 43 + 14 = 0

   

b)

7 – (– 6) – (– 8) =

7 + 6 + 8 = 21  

c)

– 8 + (– 6) – (+3) =  

- 8 - 6 - 3 = -17

d)

5 – 6 – (+7) + 1 =

5 - 6 - 7 + 1 = - 7

e)

–21 – 7 – 6 – (–15) – 2 – (–10) =

- 21 - 7 - 6 + 15 - 2 + 10 = - 11

f)

–28 + 7 + (+12) + (–1) – 6 =

- 28 + 7 + 12 - 1 - 6 = -16

g)

10 – (–8) + (–9) – (–12) – 6 + 5 =

10 + 8 - 9 + 12 - 6 + 5 = 20

h)

18 – (–5 – 2 – 3) =

18 + 5 + 2 + 3 = 25

i)

35 + (–3) – (–4 + 7 + 2) =

35 - 3 + 4 - 7 - 2 = 27

j)

8 + (3 – 10) – (3 + 5 – 10) =

8 + 3 - 10 - 3 - 5 + 10 = 3

Regra de multiplicação dos sinais

- com -  =  +

+ com + = +

- com + = -

+ com - = -