VALENDO 20 PONTOS como faço essas questões? a) (-2/5) + 3=
b) -1/6 + 2 =
c) - 5/3 + (+1)=
d) - 4 + ( - 1/2) =
e) + 5/8 + ( + 1/2) + (- 2/15) =
f) + 1/2 + ( -1/3) + ( +1/5) =
b) -1/6 + 2 =
c) - 5/3 + (+1)=
d) - 4 + ( - 1/2) =
e) + 5/8 + ( + 1/2) + (- 2/15) =
f) + 1/2 + ( -1/3) + ( +1/5) =