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