1. Commutative property of multiplication This is because it represents a*b=b*a 2. Associative property of multiplication. Multiplication problems end with the same product no matter the order of factors. 3. Correct 4. Correct 5. Associative property of addition. Even though the grouping symbols are different, it is equivalent because you are adding all the terms together. 6. Correct
The last one should also be associative property since it applies every time you combine like terms. Just a reminder: Distributive property is only when you multiply in the form of a(b+c)=ab+ac
where r is radius and h is height