Workbook Detail
Number Bonds Addition Within 20 Fill One — Set 1
Exercise 1
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Answer: 9
- Operation
- addition
- Target
- 11
- Mode
- fill_one
- Parts
- 2
- 9
- Given
- Position: leftValue: 2
- Blank
- Position: right
Exercise 2
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Answer: 16
- Operation
- addition
- Target
- 18
- Mode
- fill_one
- Parts
- 2
- 16
- Given
- Position: leftValue: 2
- Blank
- Position: right
Exercise 3
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Answer: 7
- Operation
- addition
- Target
- 19
- Mode
- fill_one
- Parts
- 7
- 12
- Given
- Position: rightValue: 12
- Blank
- Position: left
Exercise 4
Show answer
Answer: 1
- Operation
- addition
- Target
- 2
- Mode
- fill_one
- Parts
- 1
- 1
- Given
- Position: rightValue: 1
- Blank
- Position: left
Exercise 5
Show answer
Answer: 9
- Operation
- addition
- Target
- 18
- Mode
- fill_one
- Parts
- 9
- 9
- Given
- Position: leftValue: 9
- Blank
- Position: right
Exercise 6
Show answer
Answer: 2
- Operation
- addition
- Target
- 10
- Mode
- fill_one
- Parts
- 2
- 8
- Given
- Position: rightValue: 8
- Blank
- Position: left
Exercise 7
Show answer
Answer: 17
- Operation
- addition
- Target
- 19
- Mode
- fill_one
- Parts
- 2
- 17
- Given
- Position: leftValue: 2
- Blank
- Position: right
Exercise 8
Show answer
Answer: 7
- Operation
- addition
- Target
- 10
- Mode
- fill_one
- Parts
- 3
- 7
- Given
- Position: leftValue: 3
- Blank
- Position: right
Teaching Notes
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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.