# Lesson 3 Compose Three-digit Numbers

• Let’s compose three-digit numbers.

## Warm-up Number Talk: Add Tens and Ones

Find the value of each expression mentally.

## Activity 1 Sort Blocks by Value

1. Sort the blocks.

• We have hundreds.

• We have tens.

• We have ones.

2. Represent the same value with the fewest number of blocks possible.

• We have hundreds.

• We have tens.

• We have ones.

3. Represent the value of your blocks using base-ten diagrams, words, or numbers.

## Problem 1

Mai’s Blocks

1. Mai has hundreds tens

ones.

2. Draw a base-ten diagram to represent the same total value with the fewest number of each unit.

3. What is the value of Mai’s blocks?

## Problem 2

Diego’s Blocks

1. Diego has hundreds tens

ones.

2. Draw a base-ten diagram to represent the same total value with the fewest number of each unit.

3. What is the value of Diego’s blocks?

## Problem 1

Here is a base-ten diagram.

1. Draw another base-ten diagram to represent the same total value with the fewest number of each unit.

2. Write the number represented by the diagram as a three-digit number.

3. Can you make the same number with more base-ten blocks? Show your thinking using drawings, numbers or words.