Lesson 7
Multiply Three and Fourdigit Numbers by Onedigit Numbers
Lesson Purpose
Lesson Narrative
In the previous lesson, students represented multiplication using baseten diagrams and rectangular diagrams, and used place value reasoning to multiply twodigit numbers by onedigit numbers. In this lesson, they use rectangular diagrams and expressions to multiply up to fourdigit numbers by onedigit numbers. They continue to use place value reasoning to decompose the multidigit factor and to use partial products in their computation.
Students should have multiple opportunities to hear the term “partial products” as referring to the results of multiplying a part of one factor and the other factor (or a part of one factor and a part of the other factor).
 Representation
 MLR2
Learning Goals
Teacher Facing
 Multiply three and fourdigit numbers using place value understanding and properties of operations.
Student Facing
 Let’s multiply three and fourdigit numbers by onedigit numbers.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
Warmup  10 min 
Activity 1  15 min 
Activity 2  20 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
Suggested Centers
 Number Puzzles: Multiplication and Division (4–5), Stage 1: Twodigit Factors (Addressing)
 Compare (1–5), Stage 3: Multiply within 100 (Supporting)
Print Formatted Materials
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Additional Resources
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