Question

I'll fan and medal //Which equations show that the set of whole numbers is closed under addition?

Choose all answers that are correct.

A.
0 + (–1) = –1

B.
1 + 1 = 2

C.
2 + 0 = 2

D.
2 + (–1) = 1
Are B,C, and D correct?

Answer 1

The set of whole numbers is this set `{0, 1, 2, 3, 4, ... }`

basically it's the set of integers but kick out the negative integers

Answer 2

So what I picked is correct?

Answer 3

no you have one thing in there that is incorrect

Answer 4

look at the set I posted

Answer 5

Is it D?

Answer 6

D is wrong because -1 is not in the set I posted

Answer 7

but B and C are correct because those values are indeed in the set

Answer 8

Thank you now I understand

Answer 9

you're welcome