Khan Academy
Khan Academy: Practice: Dividing Whole Numbers by Unit Fractions
Practice dividing a whole number by a unit fraction. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Multiplying Fractions by Integers
Find a quick, concise explanation of how to multiply a fraction times an integer. An example is given and clearly explained.