Lesson 3
Solve Multiplicative Comparison Problems
Lesson Purpose
The purpose of this lesson is for students to interpret and represent multiplicative comparison situations in which a factor is unknown.
Lesson Narrative
In previous lessons, students matched descriptions, equations, and discrete diagrams that represented multiplicative comparison. In this lesson, they write multiplication and division equations, draw diagrams, and use their understanding of the relationship between multiplication and division.
- Engagement
- MLR7
Learning Goals
Teacher Facing
- Represent and solve multiplicative comparison problems, including those involving unknown factors.
Student Facing
- Let’s solve multiplicative comparison problems.
Required Materials
Materials to Gather
Required Preparation
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
Which representations best supported student learning in today's lesson? What evidence do you have this representation supported the understanding of most students?
Suggested Centers
- How Close? (1–5), Stage 6: Multiply to 3,000 (Addressing)
- Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Supporting)