Question

Qual é a soma de (-9)+(+6)-(-4)+(-20)=
-(+10)+(+11)-(-3)-(+9-13)=

Answer 1

(-9)+(+6)-(-4)+(-20)=
-9+6+4-20=
-3+4-20=
+1-20=
-19

-(+10)+(+11)-(-3)-(+9-13)=
-10+11+3-(-4)=
-10+11+3+4=
+1+3+4=
+4+4=
+8