The correct option is A 1
1. 7+(4+6)=(7+4)+6
Here, the associative property of addition is applied, which states that when we add, we can group the numbers in any order or combination.
2. a+b=b+a
Here, the commutative property of addition is applied, which states that changing the order of the addends does not change the sum.
3. 2 + 0 = 2
Here, the additive property is applied, which states that when any number is added to zero, the answer will always be equal to the original number.
4. 12 + 5 = 5 + 12
Here, the commutative property of addition is applied, which states that changing the order of the addends does not change the sum.