# Lesson 2 Make Hundreds

• Let’s represent hundreds in different ways.

## Warm-up Choral Count: Count by 10

Count by 10, starting at 0.
What patterns do you see?

## Problem 1

Build each number using base-ten blocks. Record how many tens blocks you use.

1. Build 90.

tens

2. Build 110.

tens

3. Build 150.

tens

## Problem 2

1. How many base-ten blocks would you need to build 200?

tens

2. How many base-ten blocks would you need to build 300?

tens

3. How many base-ten blocks would you need to build 300 if you could use 1 hundreds block?

1 hundred tens

4. How many tens would you need to build 300 if you could use 2 hundreds blocks?

2 hundreds tens

5. How many tens would you need to build 300 if you could use only hundreds blocks?

hundreds tens

## Activity 2 How Many Hundreds?

Han and Jada represented the same number using base-ten blocks. They started base-ten diagrams, but ran out of time to finish them.

Han

I only used hundreds.

Total value: 700

I only used tens.

Total value: 700

1. Use base-ten blocks to show what each student’s work would look like if they had time to finish it.

2. Explain how you know both ways of using base-ten blocks show 700.