Lesson 10
Represent Volume with Expressions
Lesson Purpose
The purpose of this lesson is for students to write, interpret, and evaluate numerical expressions that represent the volume of solid figures composed of two right rectangular prisms.
Lesson Narrative
In previous lessons, students used formulas to find the volume of right rectangular prisms. They also learned to apply these formulas to find the volumes of figures made up of two non-overlapping right rectangular prisms. In this lesson, students use what they have learned to write and interpret numerical expressions in the context of finding the volume of figures composed of rectangular prisms (MP2).
Students recognize that subtraction can be used to find the volume of figures composed of two non-overlapping rectangular prisms.
- Action and Expression
- MLR8
Activity 2: Find the Volume in Different Ways
Learning Goals
Teacher Facing
- Write and interpret numerical expressions to represent the volume of a figure decomposed in different ways.
Student Facing
- Let’s write expressions for the volume of figures.
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 10 min |
| Activity 2 | 25 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
How did the work of the previous sections in the unit lay the foundation for students to be successful in this lesson?
Suggested Centers
- Five in a Row: Multiplication (3–5), Stage 4: Three Factors (Addressing)
- Rolling for Fractions (3–5), Stage 1: Equivalent Fractions (Supporting)