# Lesson 14

Represent Division of Whole Numbers by Unit Fractions

### Lesson Purpose

The purpose of this lesson is for students to solve problems involving division of a unit fraction by a whole number and write equations to represent them.

### Lesson Narrative

In the previous lesson, students solved problems involving division of a whole number by a unit fraction. In this lesson, students continue to find quotients of a whole number by a unit fraction. In this lesson, however, they find the value of expressions without being provided a tape diagram. The numbers are not too large, however, so they may still draw a diagram if it is helpful. In the second activity, students look simultaneously at expressions involving quotients of a whole number by a fraction and quotients of a fraction by a whole number.

• Action and Expression

### Learning Goals

Teacher Facing

• Divide a whole number by a unit fraction.
• Relate diagrams, situations and expressions that represent division of a whole number by a unit fraction.

### Student Facing

• Let's solve problems involving division of a unit fraction by a whole number.

### 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

Reflect on times you observed students listening to one another’s ideas today in class. What norms would help each student better attend to their classmates' ideas in future lessons?

### 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)