November 04, 2015
Lesson 3.3
Sharing a Prize
Dividing a Fraction by a Whole Number
Focus Question: What does it mean to
divide a fraction by a whole number? What
strategies help you divide a fraction by a
whole number?
Launch Give me two number sentences that both find half of 10.
Give me two number sentences that both find a third of 12.
Give me two number sentences that both find a fifth of 20.
Summarize the pattern.
November 04, 2015
Explore
November 04, 2015
Students shared their word problems with the class.
Example: Joe had 8/3 cups of root beer. He shared with 4 friends. How
many cups of root beer did each friend get to drink?
1. Keep the first fraction (dividend)
2. Change the division symbol to multiplication.
3. Find the reciprocal of the whole number.
4. Multiply straight across.
5. Simplify if necessary.