Answer:
Step-by-step explanation:
This demonstrates the associative property of addition.
The associative property of addition states that the grouping of addends does not affect the sum. That is:
(a + b) + c = a + (b + c)
In this example:
4 + 5 + 6 = (4 + 5) + 6
= 9 + 6
= 15
And:
4 + 5 = 9
9 + 6 = 15
So rearranging the order of the addends does not change the final sum.
Therefore, this demonstrates the associative property of addition, where regrouping the addends in a sum does not affect the total.
