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Unit 3 - Lesson 3 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 3
Lesson 3: Create and Use a Ruler
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 3
Lesson 3: Create and Use a Ruler
CC BY 2021 Illustrative Mathematics®
Lesson: Create and Use a Ruler

Number Talk: Subtract Two Digits (Warm Up)

Find the value of each expression mentally.

Create a Ruler

Use your tools to make a ruler that shows lengths in centimeters.

Compare your ruler with your partner’s ruler.

Measure and Compare Lengths

Use your ruler to measure the length of each rectangle. Don’t forget to label your measurements.

How many centimeters longer is rectangle A than rectangle B?

How many centimeters longer is rectangle F than rectangle D?

Which two rectangles are the longest? How long would the rectangle be if you joined them together?

Cool Down: Use a Ruler
Use your ruler to find the length of each rectangle and figure out how much longer Rectangle B is than Rectangle A. Record any lengths in centimeters.
_______ centimeters
_______ centimeters
How much longer is Rectangle B than Rectangle A?

_______ centimeters