Grade 2 Unit 5
Lesson 2: Make Hundreds
CC BY 2021 Illustrative Mathematics®
Grade 2 Unit 5
Lesson 2: Make Hundreds
CC BY 2021 Illustrative Mathematics®
Build each number using base-ten blocks. Record how many tens blocks you use.
Build 90.
Build 110.
Build 150.
How many base-ten blocks would you need to build 200?
Han and Jada represented the same number using base-ten blocks. They started base-ten diagrams, but ran out of time to finish them.
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.
How many do you see?
How could you represent the same value in a different way? Show your
thinking using a diagram or words.
How many base-ten blocks would you need to build 300?
How many base-ten blocks would you need to build 300 if you could use 1 hundreds block?
1 hundred
How many tens would you need to build 300 if you could use 2 hundreds blocks?
2 hundreds
How many tens would you need to build 300 if you could use only hundreds blocks?
Explain why you think Han ran out of time to finish his diagram.
