Complete the following to make true statements. Then, determine the property applied.

1. 18 + __________ = 6 + 18 _________________________

2. –40 + __________ = 0 __________________________

3.(10 + 3) + 6 = 10 + _______ __________________________

4. –15 + ________ = –15 __________________________

5. [(4)(6)] 2 = 4 [___________] __________________________