In the number 607, what is the purpose of the zero?

It shows there are no hundreds.

It has no purpose and can be removed.

Which statement correctly compares the numbers 502 and 520?

502 is greater than 520 because the numbers look similar.

They are equal because they both use the digits 5, 2, and 0.

520 is greater than 502 because two tens are worth more than two ones.

502 is greater than 520 because it ends with a 2 instead of a 0.

450, because it has a 0 at the end.