What is 658.129 in expanded form

600.000 + 50.000 + 8.000 + 0.1 + 0.02 + 0.009 (after the decimal you can add as much 0s as you want it doesn't matter) if you want to check your answer, add them all up

This problem  involves multiplication of mixed fractions.
To multiply mixed fractions, you have to convert it first to improper fraction. Convert 1 3/4 to improper you'll get 7/4.
Proceed to 5/1 * 7/4
5/1 * 7/4 = 35/4
Convert the answer to lowest term, that is 8 3/4
Therefore, 5 * 1 3/4 = 8 3/4