Illustrative Mathematics

Level A
Unit: Numbers and Operations and Algebraic Thinking
Key Lesson 1.3.16 Add Three Numbers

Lesson topic: Addition of three numbers

Instructor Materials

  • Teacher Guide
  • Slides
  • CCRS Standard: 1.OA.3, 1.OA.6, 1.OA.7
  • Learning goal: Make sense of equations with addition expressions on both sides of the equal sign (For example, 3+6+7=10+6). Use the associative property to make a ten when adding three numbers.
  • 1.3 Assessment and Practice Problems

Student Materials

Related Lessons

There are no related lessons for this key lesson. 

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