Question

Efetue as subtrações:

a) 5 - (-7) =
b) -12 - (+8) =
c) 3 - (-2) =
d) -7 - (+6) =

Answer 1

a) 5 - (-7) => 5 + 7 = 10

b) -12 - (+8) => - (12 + 8) => -20

c) 3 - (-2) => 3 + 2 = 5

d) -7 - (+6) => - (7 + 6) => -13

Regra dos sinais:

( + ) × ( - ) = ( - )

( - ) × ( - ) = ( + )

( + ) × ( + ) = ( + )

Bons estudos!!