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### Course: Arithmetic (all content) > Unit 2

Lesson 17: Subtraction with regrouping within 1000- Worked example: Subtracting 3-digit numbers (regrouping)
- Worked example: Subtracting 3-digit numbers (regrouping twice)
- Worked example: Subtracting 3-digit numbers (regrouping from 0)
- Subtract within 1,000 using place value blocks
- Subtract on a number line
- Subtract within 1000
- Subtracting in your head (no regrouping)

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# Subtract within 1000

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