Unit 1, Lesson 19
Resolvamos problemas que incluyen arreglos
Grado 3
Preparation
Lesson Narrative
In previous lessons, students represented equal-groups situations using arrays and multiplication expressions, with an emphasis on equal groups. Equal groups continue to be emphasized in this lesson, as students learn that finding the product in a multiplication equation gives the total number of objects in the related array.
As students connect arrays to equations, they may write or to represent 3 rows of 5 chairs. This is fine as long as students can correctly describe where the “3 rows of 5 chairs” is represented in their array or equation. Keep collecting ideas that arise about commutativity.
- Action and Expression
- MLR8
- Explain (orally) a strategy for representing and solving multiplication problems involving arrays.
- Represent multiplication problems involving arrays using equations with a symbol for the unknown.
- Resolvamos problemas que incluyen arreglos.
Required Preparation
None
Teacher Reflection Questions
Who has been sharing their ideas in class lately? Make a note of students whose ideas have not been shared and look for an opportunity for them to share their thinking in tomorrow’s lesson.