Lesson 4 Write Three-digit Numbers

    • Let’s represent three-digit numbers using base-ten numerals.

Warm-up How Many Do You See: Blocks

How many do you see and how do you see them?

  1. Base-ten diagram. 3 hundreds. 2 tens. 4 ones.
  2. Base-ten diagrams. 3 hundreds, 2 tens, 4 ones.
  3. Base-ten diagrams. 1 hundred. 2 tens. 7 ones.

Activity 1 Place Value Riddles

Solve each riddle and write the three-digit number. Use the table to help you organize the digits. 

riddle

hundreds

tens

ones

three-digit number

1

2

3

4

5

6

  1. I have 2 ones, 7 tens, and 6 hundreds.

  2. I have 3 ones, 5 tens, and 2 hundreds.

  3. I have 7 hundreds, 5 ones, and 3 tens.

  4. I have 5 hundreds, no tens, and 9 ones.

  5. I have 4 ones, 6 tens, and 3 hundreds.

  6. I have 8 tens, 1 hundred, and no ones.

Activity 2 Mixed-up Digits

Find the number that makes each equation true. Use base-ten blocks or diagrams if they help.

  1. 4 hundreds 6 tens 2 ones

  2. 7 ones 2 hundreds 6 tens

  3. 3 tens 5 hundreds

  4. 325 hundreds ones   tens

  5. 70 300 2

  6. 836 6 800

  7. Clare and Elena worked to find the number that makes the equation true:

    7 ones  3 hundreds .

    They wrote different answers.

    • Clare wrote 7 ones 3 hundreds 37.

    • Elena wrote 7 ones 3 hundreds 307.

    Who do you agree with? Explain.

Practice Problem

Problem 1

  1. What three-digit number has 5 hundreds, 1 ten, and 6 ones?

  2. What three-digit number has 6 tens, 1 hundred, and 5 ones?

  3. What three-digit number has 1 one, 5 tens, and 6 hundreds?