Lesson 15
Fraction Division Situations
Lesson Purpose
The purpose of this lesson is for students to write and solve problems that involve dividing a whole number by a unit fraction and a unit fraction by a whole number.
Lesson Narrative
In previous lessons, students learned how to divide a whole number by a unit fraction and a unit fraction by a whole number. They reasoned about relationships between dividends, divisors, and quotients. In this lesson, students apply what they have learned in this section to write and solve problems involving division of a whole number by a unit fraction and division of a unit fraction by a whole number. Before they solve the problems, they match each one with an equation. As students match each problem with an equation, they interpret the meaning of the equation in a context (MP2).
 Engagement
 MLR8
Learning Goals
Teacher Facing
 Write situations and solve problems involving dividing a unit fraction and a whole number.
Student Facing
 Let’s write division situations and solve problems involving division of whole numbers and unit fractions.
Required Materials
Materials to Gather
Materials to Copy
 Fraction Division Problem Sort
Required Preparation
Gather poster from previous lesson that explains what students know and wonder about division of a unit fraction by a whole number.
Activity 1:
 Create a set of cards from the blackline master for each group of 2.
CCSS Standards
Addressing
Lesson Timeline
Warmup  10 min 
Activity 1  20 min 
Activity 2  15 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
What strategies did you anticipate today? Which did you not anticipate? What did you learn about student understanding from the strategies you did not anticipate?
Suggested Centers
 Compare (1–5), Stage 8: Divide Fractions and Whole Numbers (Addressing)
 Rolling for Fractions (3–5), Stage 5: Divide Unit Fractions and Whole Numbers (Addressing)
 How Close? (1–5), Stage 6: Multiply to 3,000 (Supporting)
Print Formatted Materials
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Additional Resources
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