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Key Concept
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Closure property
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When you combine any two elements of the set, the result is also included in the set.
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Select two different whole numbers and then determine whether

the division is a whole number.

Try some examples.

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These are not a whole numbers, so the set of whole numbers is not closed

under division .

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The set of whole numbers is not closed under division.

\ Key Concept \	\ Closure property \
\ When you combine any two elements of the set, the result is also included in the set. \