Collin states that 8 + (16+9) = (8+16) + 9 is always true. Which of the following properties would prove Collin is correct? 1# transitive property 2# associative property of multiplication 3# associative property of addition 4# commutative property of addition

It is associative because the multiplication properties are eliminated because you are not multiplying so the ones remaining are

Associative states: you can change the grouping of addends.

Commutative: you can change the order of the addend

Transitive property: if a=b and b=c then a=c

The correct answer is Associative property

3. associative property of addition.