Workbook Detail
Number Bonds Addition Within 20 Fill One — Set 91
4 = 1 + __
Show answer
Answer: 3
- SubType
- number-bonds
- Total
- 4
- KnownPart
- 1
- MissingPart
- 3
- Difficulty
- normal
13 = 8 + __
Show answer
Answer: 5
- SubType
- number-bonds
- Total
- 13
- KnownPart
- 8
- MissingPart
- 5
- Difficulty
- normal
Number bond: 19 = ? + 7
Show answer
Answer: 12
- SubType
- number-bonds
- Total
- 19
- KnownPart
- 7
- MissingPart
- 12
- Difficulty
- normal
15 = __ + 12
Show answer
Answer: 3
- SubType
- number-bonds
- Total
- 15
- KnownPart
- 12
- MissingPart
- 3
- Difficulty
- normal
Complete the number bond: 12 = 7 + __
Show answer
Answer: 5
- SubType
- number-bonds
- Total
- 12
- KnownPart
- 7
- MissingPart
- 5
- Difficulty
- normal
Number bond: 12 = ? + 3
Show answer
Answer: 9
- SubType
- number-bonds
- Total
- 12
- KnownPart
- 3
- MissingPart
- 9
- Difficulty
- normal
Number bond: 18 = ? + 7
Show answer
Answer: 11
- SubType
- number-bonds
- Total
- 18
- KnownPart
- 7
- MissingPart
- 11
- Difficulty
- normal
Complete the number bond: 4 = __ + 1
Show answer
Answer: 3
- SubType
- number-bonds
- Total
- 4
- KnownPart
- 1
- MissingPart
- 3
- 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.