# 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.

### Lesson Timeline

 Warm-up 10 min Activity 1 20 min Activity 2 15 min Lesson Synthesis 10 min Cool-down 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

For access, consult one of our IM Certified Partners.