Grrr... i hate math

well.. if anyone can help me i would be in debt
A x B x 1 = A x B What property??
0 = R x 0 What property??
(P x Q) x R = R x (P x Q) What property??
The properties are...
- Communitive property of Addition
- Communitive property of Multiplication
- Associative property of Addition
- Associative property of Multiplication
- Identity property of Addition
- Identity property of Multiplication
- Multiplicitive property of Zero
- Distributive property
plz help