Question 324166
I'll give you some examples:
+5+6=+10
+5-6=-1
-4-7=-11
-4+7=+3
Rules for multiplication:
+*+=+
-*+=-
+*-=-
-----------------
-(-3)+2=3+2=5
-(+4)-2=-4-2=-6
-(-8)-(-1)=8+1=9
Rules for division:
+/+=+
-/+=-
+/-=-
-/-=+
---------------------
+3/+4=3/4
-3/4=-3/4
3/-4=-3/4
-3/-4=3/4