It does not use parentheses.
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you can not use commutative property for subtraction because if you switch them around you will end up with a negative number.
The commutative property of addition and the commutative property of multiplication.
The commutative property isn't of much use in this situation, since it states that 5 x 4 = 4 x 5 Either way, it equals 20.
The commutative property of multiplication says that the numbers in a problem can change, but the answer will stay the same.