Question

3. Resolva as expressões a seguir
a) – (-3) +(+5) =
b) (+18) – (-12) =
c) (+30) + (-30) =
d) ( +7) – (- 43) =

Answer 1

A) – (-3) + (+5)

3 + 5

= 8

B) (+18) – (-12)

18 − (−12)

18 + 12

= 30

C) (+30) + (-30)

30 + −30

= 0

D) (+7) – (-43)

7 + 43

= 50