Discussion
"The sum of any two whole numbers is a whole number."
This property of whole numbers is referred to as
Answer: A
This is the closure property.
A set is closed under an operation when performing the operation on any members of the set always gives a member of the same set. Adding any two whole numbers always gives a whole number, so whole numbers are closed under addition. They are not closed under subtraction, since 3 - 5 is not a whole number.
The commutative property is about order (a + b = b + a), the associative property about grouping ((a + b) + c = a + (b + c)), and the distributive property links multiplication with addition (a(b + c) = ab + ac). None of them is what the statement describes.
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