Question

4- Efetue as operações.
a) (–5) + (–3) =
b) (+7) + (+2) + (–8) =
c) (+15) + (–1) + (–7) =
d) (+8) + (+3) + (–10) =
e) (–5) – (–3) =
f) (+5) + (0) – (–5) =
g) (–12) – (+3) – (–20) =
h) (–5) + (–8) – (+5) =

Answer 1

Resposta:

a) -8. e) -2.

b) 1. f) 10.

c) 7. g) 5.

d) 1. h) -18.

Explicação passo-a-passo:

a) (-5)+(-3)=

-5-3= -8

b) (+7)+(+2)+(-8)=

+7+2-8=

+9-8= +1 ou 1

c) (+15)+(-1)+(-7)=

+15-1-7=

+15-8= +7 ou 7

d) (+8)+(+3)+(-10)=

+8+3-10=

+11-10= +1 ou 1

e) (-5)-(-3)=

-5+3= -2

f) (+5)+(0)-(-5)=

+5+0+5= +10 ou 10

g) (-12)-(+3)-(-20)=

-12-3+20=

-15+20= +5 ou 5

h) (-5)+(-8)-(+5)=

-5-8-5= -18