Workbook Detail
Number Bonds Addition Within 20 Fill Both — Set 66
15 = __ + 5
Show answer
Answer: 10
- SubType
- number-bonds
- Total
- 15
- KnownPart
- 5
- MissingPart
- 10
- Difficulty
- normal
2 = 1 + __
Show answer
Answer: 1
- SubType
- number-bonds
- Total
- 2
- KnownPart
- 1
- MissingPart
- 1
- Difficulty
- normal
16 = 15 + __
Show answer
Answer: 1
- SubType
- number-bonds
- Total
- 16
- KnownPart
- 15
- MissingPart
- 1
- Difficulty
- normal
Number bond: 2 = ? + 1
Show answer
Answer: 1
- SubType
- number-bonds
- Total
- 2
- KnownPart
- 1
- MissingPart
- 1
- Difficulty
- normal
5 = 2 + __
Show answer
Answer: 3
- SubType
- number-bonds
- Total
- 5
- KnownPart
- 2
- MissingPart
- 3
- Difficulty
- normal
Number bond: 4 = ? + 2
Show answer
Answer: 2
- SubType
- number-bonds
- Total
- 4
- KnownPart
- 2
- MissingPart
- 2
- Difficulty
- normal
10 = 1 + __
Show answer
Answer: 9
- SubType
- number-bonds
- Total
- 10
- KnownPart
- 1
- MissingPart
- 9
- Difficulty
- normal
10 = __ + 2
Show answer
Answer: 8
- SubType
- number-bonds
- Total
- 10
- KnownPart
- 2
- MissingPart
- 8
- Difficulty
- normal
Teaching Notes
Download this free number bonds addition within 20 fill both 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 Both 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.