Illustrative Mathematics
Level A
Unit: Numbers and Operations and Algebraic Thinking
Key Lesson 1.5.3 Add It, Explain It
Lesson topic: Addition of two-digit numbers
Instructor Materials
- Teacher Guide
- Slides
- CCRS Standard: 1.NBT.4
- Learning goal: Add 2 two-digit numbers, without composing a ten, using methods based on place value. Write equations to represent addition methods.
- 1.5 Assessment and Practice Problems
Student Materials
Related Lessons
Review and Extend
Use these supplemental lessons if needed after teaching this key lesson.
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