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Course: 3rd grade (2018 edition) > Unit 1
Lesson 1: Strategies for adding two and three-digit numbers- Breaking apart 3-digit addition problems
- Break apart 3-digit addition problems
- Addition using groups of 10 and 100
- Add using groups of 10 and 100
- Adding and subtracting on number line
- Add on a number line
- Estimating adding and subtracting 3-digit numbers
- Estimate to add multi-digit whole numbers
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