Lesson 4 Add Your Way

    • Let’s add numbers within 1,000.

Warm-up Number Talk: Hundreds, Tens, and Ones

Students working together.

Find the value of each expression mentally.

Activity 1 Strategies to Add

Find the value of each sum in any way that makes sense to you. Explain or show your reasoning.

Activity 2 Two Ways to Add

Andre found the value of . His work is shown.




Clare found the value of . Her work is shown.




With your partner, discuss:

  • What’s different about Clare and Andre’s work?

  • What’s the same?

Practice Problem

Problem 1

Find the value of each sum in any way that makes sense to you. Explain or show your reasoning.