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

Question

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

thebadyboy · Answer

@bohotness

anonymous · Answer

"Closed" in this question is shown when you takes two whole numbers, e.g., {0, 1, 2, 3, . . .} and multiply them to get another whole number. The choices that illustrate this property are C and D. Choices A and B do not show closure over the whole numbers since -1 is not a whole number.