Answer:
1) inverse multiplication
2) Cumulative addition
3) Inverse addition
Explanation:
While solving the expression we will mention the statements.

We will solve the left hand side of the given equation to get the right side.
(inverse multiplication)
Now expression becomes
in this expression 1 + 5 = 6 ( cumulative addition)
Now the expression is
6 +(-1 ) = 5 (inverse addition)
So three statements are justifying the solution.
1) inverse multiplication
2) Cumulative addition
3) Inverse addition