Lesson 5
Multiply a Unit Fraction by a Nonunit Fraction
Lesson Purpose
The purpose of this lesson is for students to use diagrams and expressions to calculate the product of a unit fraction and a nonunit fraction.
Lesson Narrative
While the previous lesson used a context to help visualize fractions and their product, in this lesson the fractions are more complex and there is no context so students can focus on how the diagrams and expressions relate to the value of the product. In this lesson students also begin to work with side lengths that are fractions greater than 1. Students also practice estimating areas of rectangles where the side lengths are not shown.
 Action and Expression
 MLR8
Learning Goals
Teacher Facing
 Find the product of a unit fraction and a nonunit fraction.
Student Facing
 Let’s multiply a unit fraction and a nonunit fraction.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
Warmup  10 min 
Activity 1  15 min 
Activity 2  20 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
Suggested Centers
 Rolling for Fractions (3–5), Stage 4: Multiply Fractions (Addressing)
 How Close? (1–5), Stage 7: Multiply Fractions and Whole Numbers to 5 (Supporting)
Print Formatted Materials
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Additional Resources
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