Question

Which sets of numbers are closed under addition?

Choose all answers that are correct.

A.
whole numbers

B.
natural numbers

C.
negative integers

D.
integers

Answer 1

I think it's A. whole numbers

Answer 2

All of the answers are correct because when ever you add any of these numbers to themselves, the answer will always be from that set of numbers. For example, negative+negative= negative. Hope this helped!