# Lesson 9 Compare Numbers on the Number Line

• Let’s compare numbers on the number line.

## Warm-up Estimation Exploration: Hundreds

What number could this be?

1. Record an estimate that is:

too low

too high

2. Record an estimate that is:

too low

too high

## Activity 1 Compare Comparisons

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

Diego

• I see 3 hundreds for each number.

• 317 only has 1 ten, but 371 has 7 tens.

Clare

• Each has 3 hundreds.

• 371 has 7 tens, but 317 only has 1 ten.

• I can see that 371 is farther to the right on my number line, so I know it is greater than 317.

1. What is the same and different about these students’ representations?

Discuss with a partner.

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.

3. Use , , or to compare 483 and 443.

## Problem 1

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

2. Use , , and to compare 420 and 590.

## Problem 2

1. 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.

2. Use , , and to compare 378 and 387.

## Problem 3

1. Diego and Jada compared 2 numbers. Use their work to figure out what numbers they compared. Then use , , and to compare the numbers.

2. Which representation was most helpful to compare the numbers? Why?

## Problem 1

1. Estimate the location of 247 and 274 on the number line. Mark each number with a point. Label the point with the number it represents.

2. Use , , or to compare 247 and 274. Explain your reasoning.