Question

5-Calcule as subtrações de acordo com o exemplo.

Exemplo: (– 10) – (– 4) + (– 2) – (– 3) =
= – 10 + 4 – 2 + 3 =
= – 10 – 2 + 4 + 3 =
= – 12 + 7 =
= – 5

a) (+ 6) + (– 1) + (– 5) + (– 3) =
b) (– 10) – (– 2) – (+ 4) – (– 1) =
c) (– 4) – (+ 2) – (– 1) + (– 5) =
d) (+ 3) – (– 2) + (– 9) + (– 5) =

Answer 1

Dica: sinais diferentes = - (negativo) e sinais iguais = + (positivo)

Answer 2

Resposta:

a)(+ 6) + (– 1) + (– 5) + (– 3) =

= 6 – 1 – 5 – 3

= 6 – 9

= – 3

b) (– 10) – (– 2) – (+ 4) – (– 1) =

= – 10 + 2 – 4 + 1

= – 14 + 3

= – 11

c)(– 4) – (+ 2) – (– 1) + (– 5) =

= – 4 – 2 + 1 – 5

= – 11 + 1

= – 10

d) (+ 3) – (– 2) + (– 9) + (– 5) =

= 3 + 2 – 9 – 5

= 5 – 14

= – 9

Explicação passo a passo

- com – = +

+ com –  =  –

+ com + = +

– com + = –