Lesson 5
Multiply a Unit Fraction by a Non-unit 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 non-unit 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 non-unit fraction.
Student Facing
- Let’s multiply a unit fraction and a non-unit fraction.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
How did the work of the previous lessons lay the foundation for students to be successful in Activity 1 of this lesson?
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)