Unit 6, Lesson 6
Multipliquemos números de dos dígitos por números de un dígito
Grado 4
Preparation
Lesson Narrative
In the previous lesson, students solved two-digit multiplication problems in a way that made sense to them. Students 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 IM Grade 3.
Students analyze base-ten diagrams and diagrams that involve rectangles, some of which are partitioned by place value. Students 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
- Comprehend (in spoken language) the meaning of the term “partial products.”
- Interpret (orally and in writing) diagrams that represent partial products as a strategy for multiplying two-digit and one-digit whole numbers.
- Represent products of two-digit and one-digit numbers with a diagram and calculate the value.
Required Preparation
None
Teacher Reflection Questions
What strategy did most students use in their work today? What strategy did you anticipate today? Which did you not anticipate?