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.
Build 90.
tens
Build 110.
tens
Build 150.
tens
Problem 2
How many base-ten blocks would you need to build 200?
tens
How many base-ten blocks would you need to build 300?
tens
How many base-ten blocks would you need to build 300 if you could use 1 hundreds block?
1 hundred tens
How many tens would you need to build 300 if you could use 2 hundreds blocks?
2 hundreds tens
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.
Jada
Han
I only used hundreds.
Total value: 700
I only used tens.
Total value: 700
Use base-ten blocks to show what each student’s work would look like if they had time to finish it.
Explain how you know both ways of using base-ten blocks show 700.
Complete Jada’s base-ten diagram.
Explain why you think Han ran out of time to finish his diagram.
Practice Problem
Problem 1
How many hundreds are the same as 50 tens? Explain your reasoning.
How many tens are the same as 6 hundreds? Explain your reasoning.