Subtraction strategies included:
- Use fingers
- Count objects
- Use a ten frame
- Draw a picture
- Friends of 10
- Doubles Facts
- Near doubles
- Bridge to 10
- Part Part Whole
- Number Line
- Commutation
- Tallies
- Counting Back
- Inverse Operations
- Jump Strategy
- Split Strategy
- Column Subtraction without regrouping
- Column Subtraction with regrouping