adding
-2+-9=
what is -7
-8-20=
what is -27
-3(23)=
what is -129
-9/-27=
what is 3
-30+100
what is 70
-40-70=
what is -110
60(-7)=
what is -420
30/-3=
what is -10
-70+40=
what is -30
-43-53=
what is -96
35(-14)=
what is -490
80/-10=
what is -8
400+-40=
what is 360
-500-47=
what is -547
400(-50)=
what is -20,000