Unit 6, Lesson 7
Multiply Three- and Four-Digit Numbers by One-Digit Numbers
Grade 4
Preparation
Lesson Narrative
In the previous lesson, students represented multiplication using base-ten diagrams and rectangular diagrams, and used place value reasoning to multiply two-digit numbers by one-digit numbers. In this lesson, they use rectangular diagrams and expressions to multiply up to four-digit numbers by one-digit numbers. They continue to use place value reasoning to decompose the multi-digit factor and to use partial products in their computation.
Students should have multiple opportunities to hear the term “partial products” 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
- Interpret (orally and in writing) diagrams that represent a partial product as a strategy for multiplying three- and four-digit numbers by place.
- Represent products of three- or four-digit and one-digit numbers with a diagram and calculate the value.
- Let’s multiply three- and four-digit numbers by one-digit numbers.
Required Preparation
None
Teacher Reflection Questions
How can you leverage each of your student’s ideas to support them in being seen and heard in tomorrow’s math class?