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Subtraction is commutative... in a way. You can convert any subtraction to an addition.

7 - 2 is NOT the same as 2 - 7.

However, when turning the terms around, you may keep the sign, so that 7 - 2 is the same as -2 + 7. This is justified by the commutative law of addition.

Similarly with division: 10 / 2 is not the same as 2 / 10, but you can convert 10 / 2 into (1/2) x 10.

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โˆ™ 2010-06-10 16:00:38
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Algebra

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Q: Are subtraction and division commutative and associative?
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