Lesson 1-Count Back

- Objective: Use count back 1, 2, or 3 as a strategy to subtract.
- Vocabulary:
**Count back**

- Recall addition facts to subtract numbers within 20.

- Use addition as a strategy to subtract numbers with in 20.

- Use make a ten as a strategy to subtract.

- Subtract by breaking apart to make a ten.

- Solve subtraction problem situations using the strategy act it out.