-2-(-4)=
-8-(-5)=
-20-30=
36+10=
18+(-3)=
-5-(+3)=
30-(-10)=
-8+6=
-7+10=
-25+10=
-25+(-15)=
-50
-40
40
2
-15
46
3
-3
-8
-2
15
