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Unit 5 - Lesson 9 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 5
Lesson 9: Compare Numbers on the Number Line
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 5
Lesson 9: Compare Numbers on the Number Line
CC BY 2021 Illustrative Mathematics®
Lesson: Compare Numbers on the Number Line

Estimation Exploration: Hundreds (Warm Up)

What number could this be?

1.

Record an estimate that is:

2.

Record an estimate that is:

Compare Comparisons

Each student compared 371 and 317, but represented their thinking in different ways.

3.

What is the same and different about these students’ representations? Discuss with a partner.

4.

Try Jada’s way.

Estimate the location of 483 and 443 on the number line. Mark each number with a point. Label the point with the number it represents.

5.
Use >, =, or < to compare 483 and 443.

448__________443

Compare in Different Ways

6.
Locate and label 420 and 590 on the number line.

Use >, =, or < to compare 420 and 590.

420__________590
7.
Estimate the location of 378 and 387 on the number line. Mark each number with a point. Label the point with the number it represents.

Use >, =, or < to compare 378 and 387.

378__________387
Diego and Jada compared 2 numbers.

8.

Use their work to figure out what numbers they compared.

9.
Then use >, =, or < to compare the numbers.

__________
Cool Down: Compare Numbers on the Number Line
10.

Estimate the location and label 681 and 618 on the number line.

11.
Use <, >, or = to compare 681 and 618.

681__________618
12.

Use the number line to explain how you know your comparison is true.