Workbook Detail
Number Bonds Addition Within 20 Fill One — Set 20
6 = 2 + __
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Answer: 4
- SubType
- number-bonds
- Total
- 6
- KnownPart
- 2
- MissingPart
- 4
- Difficulty
- normal
19 = 6 + __
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Answer: 13
- SubType
- number-bonds
- Total
- 19
- KnownPart
- 6
- MissingPart
- 13
- Difficulty
- normal
Complete the number bond: 17 = 1 + __
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Answer: 16
- SubType
- number-bonds
- Total
- 17
- KnownPart
- 1
- MissingPart
- 16
- Difficulty
- normal
3 = __ + 1
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Answer: 2
- SubType
- number-bonds
- Total
- 3
- KnownPart
- 1
- MissingPart
- 2
- Difficulty
- normal
Complete the number bond: 15 = __ + 13
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Answer: 2
- SubType
- number-bonds
- Total
- 15
- KnownPart
- 13
- MissingPart
- 2
- Difficulty
- normal
Number bond: 18 = 5 + ?
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Answer: 13
- SubType
- number-bonds
- Total
- 18
- KnownPart
- 5
- MissingPart
- 13
- Difficulty
- normal
Complete the number bond: 13 = __ + 2
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Answer: 11
- SubType
- number-bonds
- Total
- 13
- KnownPart
- 2
- MissingPart
- 11
- Difficulty
- normal
Complete the number bond: 4 = __ + 3
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Answer: 1
- SubType
- number-bonds
- Total
- 4
- KnownPart
- 3
- MissingPart
- 1
- Difficulty
- normal
Teaching Notes
Download this free number bonds addition within 20 fill one math worksheet. Uniquely generated with an answer key — great for homework, practice, or assessment.
Frequently Asked Questions
How do I use this Number Bonds Addition Within 20 Fill One Math Worksheet worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.