Question

efetue os calculos:b;(+13)+(-5)=c;(-2)+(-20)=d;(30)+(+6=?

Answer 1

B) (+13)+(-5)=
(18)+(-5)=
23(-5)=
18-5=13
C) (-2)+(-20)=
(18)+(-20)=
38(-20)=
38-20=18
D) (30)+(+6)=
36(+6)=
36+6=42
PRONTO