Lesson 16
Multiply Numbers Larger than 20
Lesson Purpose
The purpose of this lesson is for students to multiply within 100, where one factor is greater than 20.
Lesson Narrative
Previously, students have used strategies based on place value and properties of operations to find products of a whole-number and a teen number. Here, students extend this work to larger two-digit numbers. Students first analyze different strategies and then apply one or more of them to find the value of other products. The lesson also includes an optional game students can play to apply what they’ve learned to multiply larger numbers.
- Engagement
- MLR8
Learning Goals
Teacher Facing
- Multiply within 100, where one factor is greater than 20.
- Use properties based on place value and properties of operations to multiply.
Student Facing
- Let’s multiply numbers that are larger than 20.
Required Materials
Materials to Gather
Materials to Copy
- Centimeter Grid Paper - Standard
- Number Cards (0-10)
Required Preparation
Activity 3:
- Create a set of cards from the blackline master for each group of 2.
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 15 min |
| Activity 3 | 10 min |
| Lesson Synthesis | 5 min |
| Cool-down | 5 min |
Teacher Reflection Questions
When do your students feel successful in math? How do you know?
Suggested Centers
- Compare (1–5), Stage 3: Multiply within 100 (Addressing)
- How Close? (1–5), Stage 5: Multiply to 100 (Addressing)
Print Formatted Materials
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Additional Resources
| Google Slides | For access, consult one of our IM Certified Partners. |
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| PowerPoint Slides | For access, consult one of our IM Certified Partners. |