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## Arithmetic (all content)

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

Lesson 4: Addition and subtraction within 20- Adding within 20 using place value blocks
- Adding within 20 using ten frames
- Adding 7 + 6
- Adding 8 + 7
- Add within 20 visually
- Add within 20
- Adding with arrays
- Adding with arrays
- Subtracting different ways
- Subtract within 20 using a number line
- Subtract within 20 using place value blocks
- Subtract within 20 using ten frames
- Subtracting 14 - 6
- Subtract within 20 visually
- Subtract within 20
- Find missing number (add and subtract within 20)
- Add & subtract within 20

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# Add within 20 visually

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