Lesson 8
Divide to Multiply Non-unit Fractions
Lesson Purpose
The purpose of this lesson is for students to represent and solve problems involving a non-unit fraction.
Lesson Narrative
In this lesson, students to make sense of the product of a whole number and a non-unit fraction. Students relate the product of a whole number and a non-unit fraction to the product of a whole number and a unit fraction. They will have more opportunities to multiply a whole number by a fraction in the next section, systematically using the idea of area. This lesson continues to focus on the relationship between multiplication and division and encourages students to solve and interpret the problems in ways that make sense to them.
- Engagement
Learning Goals
Teacher Facing
- Connect division to multiplication of a whole number by a non-unit fraction.
Student Facing
- Let’s solve problems about multiplying whole numbers by fractions.
Required Materials
Materials to Gather
Required Preparation
Gather the chart from the synthesis of a previous lesson that describes what students know and wonder about the relationship between multiplication and division.
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
If you were to teach this lesson again what would you do the same? What would you change?
Suggested Centers
- Target Measurements (2–5), Stage 5: Fractions of Angles (Addressing)
- Compare (1–5), Stage 5: Fractions (Supporting)