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?

Activity 1 Make Hundreds

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?

Two students with base-ten blocks.

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

Jada

Han

Base-ten diagram drawing by Jada. 4 hundreds.
Base-ten diagram drawing by Han. 15 tens.

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.

  3. Complete Jada’s base-ten diagram.

  4. Explain why you think Han ran out of time to finish his diagram.

Practice Problem

Problem 1

  1. How many hundreds are the same as 50 tens? Explain your reasoning.

  2. How many tens are the same as 6 hundreds? Explain your reasoning.