Choose the correct answer and Fill in the blanks:
-15+-18=_____.+3/-33
Consider
-15+-18-15-18=-33
Hence, -15+-18=-33
-4+(___)=-12.-8/+8
-72--90=_____.+18/-162
-3--6=_____.-9/+3
-1--1=__.0/-2
-1+___=+5.-6/+6