Unit 2, Lesson 11
Fractional Side Lengths Greater than 1
Grade 5
Preparation
Lesson Purpose
The purpose of this lesson is for students to find the area of a rectangle when one of the side lengths is a fraction greater than 1.
Lesson Narrative
In previous lessons, students multiplied fractions by whole numbers and found the area of rectangles with one fractional side length when the fraction was less than 1. They used visual representations to support their reasoning. For example, students used this diagram to explain why
In this lesson, students apply these strategies to find the area of a rectangle with a fractional side length greater than 1.
Using an area diagram like this, the same reasoning shows that
- Describe (orally and in writing) how different, equivalent multiplication expressions represent the area of a given rectangle with fractional side lengths greater than 1.
- Explain (orally) strategies used to determine the area of a rectangle with fractional side lengths and represent the area with a multiplication expression.
- Let’s find the area of more rectangles.
Required Preparation
None
Teacher Reflection Questions
- Why is it important for students to be able to write and interpret different expressions to represent and find the area of rectangles with fractional side lengths?
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