Commutative basically means to move around. Addition and multiplication are commutative. That means that you can change around the equation and the answer will be the same. Such as 2 + 5 + 7, as 5 + 2 = 7. Subtraction is not commutative, you can not change a subtraction problem and get the same answer. An example is 5 -2 =3, but 2 - 5 = -3.

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