Question

whole number are not closed under dash and dash
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Answer 1

Answer:

The set of whole numbers is "closed" under addition and multiplication. ) are the set of all of the natural numbers, plus their additive inverses (their negatives), and zero {... -4, -3, -2, -1, 0, 1, 2, 3, 4, ....}

Answer 2

subtraction and division........