Final answer:
The Commutative Property of Addition, which denotes that the order of numbers in addition doesn't affect the total, is best represented by the equation a + b = b + a.
Step-by-step explanation:
The Commutative Property of Addition states that the order in which numbers are added does not change the sum. Given the options, the equation that best illustrates this property is a + b = b + a. It shows that whether you add a to b or b to a, the result will be the same. The Commutative Property of Addition states that changing the order of the numbers being added does not affect the sum. Out of the given equations, the one that illustrates the Commutative Property of Addition is a + (b + c) = (a + b) + c. The equation shows that the order of additions can be rearranged without changing the sum, as long as the numbers being added remain the same.
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