The property of the real number 1/2 + 2/3 = 2/3 + 1/2 is ______?

The property of the real number 1/2 + 2/3 = 2/3 + 1/2 is ______?

Explanation
The equation 1/2 + 2/3 = 2/3 + 1/2 demonstrates that the order of the numbers being added does not change the result.
This is an example of the Commutative property of addition, which states that a + b = b + a.