Canada has a population that is about 1/10 as large as the United States. If Canada's population is about 32 millon, about how many people live in the United States? Explain the number of zeros in your the answer.

Since 32 mil is 1/10 of the US pop, multiply 32 mil by 10 so you get the 10/10 aka the whole US pop. That means it would be 320,000,000. All you do is add a zero to 32 mil since you multiply by 10. 32 mil originally had 6 zeros. After multiplying, you have 7 zeros.