After many hours of hardcore maths classes.
I know the answer, it is 1.
Hope i helped, :)
-1
Seven minus a negative six equals a positive one
+3
2
Two times six minus four is equal to 8.
-1 minus 6 is -7
5
what does seven plus equal
0-6=-6 (negative six)
One minus one eighth is seven eighths.
-2
Seven minus -6 is 13.