Lesson 6

Multiply Two-digit Numbers and One-digit Numbers

Lesson Purpose

The purpose of this lesson is for students to multiply a two-digit number and a one-digit number using place value understanding.

Lesson Narrative

In the previous lesson, students solved two-digit multiplication problems in a way that made sense to them. They discussed decomposing factors and considered different representations of their strategy. In this lesson, students extend these ideas to find the value of products beyond 100, focusing on representations and strategies based on place value and the properties of operations, which are familiar from grade 3.

Students analyze base-ten diagrams and diagrams that involve rectangles, some of which are partitioned by place value. They explain how the diagrams represent multiplication and make connections between them, deepening their understanding of place value and properties of operations. At the end of the lesson, students consider a rectangular diagram that will be used through the rest of the section.

• Engagement
• MLR1

Learning Goals

Teacher Facing

• Multiply two-digit and one-digit whole numbers using place value understanding and properties of operations.

Student Facing

• Let’s multiply two-digit and one-digit numbers.

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

What strategy did most students use in their work today? What strategy did you anticipate today? Which did you not anticipate?

Suggested Centers

• Can You Draw It? (1–5), Stage 4: Area and Perimeter (Supporting)
• Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Supporting)

Print Formatted Materials

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