Question

Calcule:

a) (+3) – (−20) =

b) (−2) –(−12) =

c) (−9) – (+6) =

d) (+13) – (+3) =

e) (−15) – (−5) =​

Answer 1

*Sinais iguais da positivo

*Sinais diferentes da negativo.

a) (+3) – (−20) =

3+20=

23

b) (−2) –(−12) =

-2+12=

10

c) (−9) – (+6) =

-9-6=

15

d) (+13) – (+3) =

13-3=

10

e) (−15) – (−5) =​

-15+5=

-10