Unit 6
Situations Involving Area
Lesson 15
Multiplying and Dividing Multi-digit Numbers
Expressions and Equations
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Let’s divide to find the side length of a rectangle.
Unit 6 ● Lesson 15
Learning
Goal
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Area of a Soccer Field
Unit 6 ● Lesson 15 ● Warm-up
Estimate: What is the length of the soccer field in meters?
Record an estimate that is:
How did you make your estimate? How did you know it’s reasonable?
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Estimation Exploration
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Elena’s Mural
Unit 6 ● Lesson 15 ● Activity 1
What is a mural?
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Launch
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Elena’s Mural
Unit 6 ● Lesson 15 ● Activity 1
Elena used 189 square tiles to create a rectangular mural for the art club. The mural is 7 tiles wide.
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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Elena’s Mural
Unit 6 ● Lesson 15 ● Activity 1
Let’s share your responses and reasoning.
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Activity Synthesis
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Tyler’s Mural
Unit 6 ● Lesson 15 ● Activity 2
Tyler is also creating a rectangular mural for the art club. He has 197 tiles for his mural. His mural is 6 tiles wide.
Make one round to visit each poster. Place your sticky note on the poster with a strategy that matches your strategy or that makes the most sense to you.
After your first round, make another round to visit 1–2 other posters that you didn’t select. Make sense of the strategy of the poster and be prepared to explain how it is different than yours.
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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Tyler’s Mural
Unit 6 ● Lesson 15 ● Activity 2
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Activity Synthesis
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Situations Involving Area
Unit 6 ● Lesson 15
Today we used division to find side lengths of rectangles. For each rectangle, we knew the area and the length of one side and we used division to find the length of the other.
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Lesson Synthesis
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
Sticky Notes on the Door
Unit 6 ● Lesson 15
Jada’s class is decorating their door with square sticky notes for their teacher. Each sticky note has a drawing or a message from a student.
The class used 234 square sticky notes to cover their classroom door completely, leaving no gaps or overlaps between the notes. It takes 9 square notes to cover the width of the door.
How many square notes does it take to cover the full height of the door? Show how you know.
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Cool-down
Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.
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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Illustrative Mathematics.