Find factors, multiples, common factors, and common multiples to solve numerical and contextual problems.
Work with multiples of a number
Problem
Is \(54\) a multiple of \(9\)?
Big Picture
What this problem is really about
A multiple of nine must equal nine times a whole number. We’ll divide fifty-four by nine and check whether the quotient is whole with no remainder, then multiply back to verify the relationship. That definition settles the question without relying on the last digit.
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