Multi-digit subtraction with regrouping (K-A)

• Worked example: Subtracting 3-digit numbers (regrouping) (K-A)
• Worked example: Subtracting 3-digit numbers (regrouping twice) (K-A)
• Worked example: Subtracting 3-digit numbers (regrouping from 0) (K-A)
• Subtracting in your head (no regrouping) (K-A)
• Relate place value to standard algorithm for multi-digit subtraction (K-A)