Question

3.

(1 pt)
Which sets of numbers are closed under subtraction?

Choose all answers that are correct.

A.
odd natural numbers

B.
rational numbers

C.
{0, 1}

D.
{0, 1, 2}

Answer 1

What do you think?

Answer 2

A. and D

Answer 3

Odd natural numbers? {1,3,5,7}

1-3 = -2, which is not part of odd natural numbers.

So it's not A.

Why do you think it is D?

Answer 4

it is B

Answer 5

Yeah