Illustrative Mathematics
Level A
Unit: Numbers and Operations and Algebraic Thinking
Lesson 1.5.11 How Did You Add?
Lesson topic: Addition of 2 two-digit numbers
Instructor Materials
- Teacher Guide
- Slides
- CCRS Standard: 1.NBT.4, 1.OA.7
- Learning goal: Add 2 two-digit numbers using methods based on place value and properties of operations. Make sense of equations that represent addition methods.
- 1.5 Assessment and Practice Problems
Student Materials
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