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Subtract One-digit from Two-digit: Up to 18 Level 2
Subtract One-digit numbers: Up to 10 Level 2
Subtract Zero or All Level 2
Count On & Use Ten to Subtract (up to 20) Level 2
Subtract by Counting On (up to 20) Level 2
Use Ten to Subtract Level 2
Subtract by Counting Back (up to 20) Level 2
