Complete the following to make true statements then determine the property used.

Complete the following to make true statements then determine the property used.
1. 18 + 6 = 6 + 18 → Commutative Property of Addition
2. (-40) + 40 = 0 → Inverse Property of Addition
3. (10+3) + 6 = 10+ (3+6) → Associative Property of Addition
4. 42 + 0 = 42 → Identify Property of Addition
5. 30(1) = 30 → Closure Property of Multiplication