Question

HELP PLZ..

Which equations show that the set of whole numbers is closed under multiplication?

Choose all answers that are correct.

A.
–1 • –1 = 1

B.
0 • –1 = 0

C.
0 • 2 = 0

D.
2 • 1 = 2

Answer 1

@paki @johnweldon1993

Answer 2

A and B have negative integers so they are not the answer.

Answer 3

C and D only use whole numbers. (0, 1, 2, 3 ...)

so, C and D.