Question

Calcule observando as regras dos sinais:

a) – 8 + 6 – 1=

b) (+8) – (+5)=


c) – 13 + 7 – 2 – 8 + 15 – 1=


d) – 2 – 4 – 1=


e) + 22 – 3 – 14 – 5 + 24 + 12=


f) 12 – 7 + 3=


g) (– 3) + (+ 9)=


h) (– 2) – (– 3) + ( + 5)=


i) 4 + 13 – 21=


j) (+ 2) + (– 7)=​

Answer 1

Resposta:

a) – 8 + 6 – 1= -3

b) (+8) – (+5)= -3

c) – 13 + 7 – 2 – 8 + 15 – 1= -2

d) – 2 – 4 – 1= 1

e) + 22 – 3 – 14 – 5 + 24 + 12= 26

f) 12 – 7 + 3= 8

g) (– 3) + (+ 9)=6

h) (– 2) – (– 3) + ( + 5)=6

i) 4 + 13 – 21=-4

j) (+ 2) + (– 7)=-5