For the first question, the equation \(5 + 2 = 2 + 5\) represents the **Commutative Property** of addition. The Commutative Property states that changing the order of the addends does not change the sum.
For the second question, the equation \((40 + 20) + 10 = (40 + 10) + 20\) represents the **Associative Property** of addition. The Associative Property states that the way in which numbers are grouped in addition does not change their sum.
So, the answers are:
1. Commutative Property
2. Associative Property