Main content

### Course: Arithmetic (all content) > Unit 2

Lesson 15: Strategies for adding 2- and 3-digit numbers- Breaking apart 3-digit addition problems
- Break apart 3-digit addition problems
- Solving 3-digit addition in your head
- 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
- Select strategies for adding within 1000

© 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice