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18-03-2016
Mathematics

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what is a counterexample for "subtraction of whole numbers is commutative" ??

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RASEA23 RASEA23

18-03-2016

The commutatice property for addition says a+b=b+a
If it was for subtraction, then it would be a-b=b-a
Take a=7 and b=5
7-5 is not equal to 5-7
2 is not equal to -2
So subtraction is not commutative for whole numbers.

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