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

1. 18+_____ =6+18. _____________
2.-40+_______=0. ______________
3.(10-30)+6=10+__ _____________
4.-15+____= -15. ______________
5. _____ +0=42. ______________
6. -2 (5+8)= + (-16) ______________
7. 30(____)=30. ______________
8. [(4)(6)] 2=4 [___] _____________
9. 15 * ____=0. ______________
10. (12)(-4)=____12 ______________​