Unit 2, Lesson 5
Representemos productos como áreas
Grado 3
Preparation
Lesson Purpose
The purpose of this lesson is for students to connect multiplication expressions to rectangular areas.
Lesson Narrative
In previous lessons, students counted unit squares to find the areas of rectangles. In this lesson they explicitly connect multiplication to rectangular areas. Students match multiplication expressions to rectangular areas, specifically relating the factors of the expressions to the rows and the columns of squares in the rectangle. Then, students are given multiplication expressions and create matching rectangles, with inch tiles and drawings on grids.
- Engagement
None
- Draw and label on a gridded rectangle to represent a multiplication expression. Relate the area of the rectangle and the value of the expression.
- Match (orally) gridded rectangles and multiplication expressions that represent the same equal groups.
- Conectemos expresiones de multiplicación con áreas.
Required Materials
Activity 2
Required Preparation
Activity 1
- Post each rectangle from the blackline master around the classroom with space to accommodate groups of 3 or 4 students.
Teacher Reflection Questions
In previous lessons students worked with arrays as a way to represent multiplication. How did students’ previous work with arrays support them in representing products as rectangular areas?
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