Fact Family Add Sub Within 20 Fill Blanks — Set 84
Write the fact family for 9, 3, 12:
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Answer: 9 + 3 = 12; 3 + 9 = 12; 12 - 9 = 3; 12 - 3 = 9
- SubType
- fact-family
- Facts
- 9 + 3 = 12
- 3 + 9 = 12
- 12 - 9 = 3
- 12 - 3 = 9
- Difficulty
- normal
Write the fact family for 4, 9, 13:
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Answer: 4 + 9 = 13; 9 + 4 = 13; 13 - 4 = 9; 13 - 9 = 4
- SubType
- fact-family
- Facts
- 4 + 9 = 13
- 9 + 4 = 13
- 13 - 4 = 9
- 13 - 9 = 4
- Difficulty
- normal
Write the fact family for 6, 2, 8:
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Answer: 6 + 2 = 8; 2 + 6 = 8; 8 - 6 = 2; 8 - 2 = 6
- SubType
- fact-family
- Facts
- 6 + 2 = 8
- 2 + 6 = 8
- 8 - 6 = 2
- 8 - 2 = 6
- Difficulty
- normal
Write the fact family for 12, 5, 17:
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Answer: 12 + 5 = 17; 5 + 12 = 17; 17 - 12 = 5; 17 - 5 = 12
- SubType
- fact-family
- Facts
- 12 + 5 = 17
- 5 + 12 = 17
- 17 - 12 = 5
- 17 - 5 = 12
- Difficulty
- normal
Write the fact family for 4, 8, 12:
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Answer: 4 + 8 = 12; 8 + 4 = 12; 12 - 4 = 8; 12 - 8 = 4
- SubType
- fact-family
- Facts
- 4 + 8 = 12
- 8 + 4 = 12
- 12 - 4 = 8
- 12 - 8 = 4
- Difficulty
- normal
Write the fact family for 5, 4, 9:
Show answer
Answer: 5 + 4 = 9; 4 + 5 = 9; 9 - 5 = 4; 9 - 4 = 5
- SubType
- fact-family
- Facts
- 5 + 4 = 9
- 4 + 5 = 9
- 9 - 5 = 4
- 9 - 4 = 5
- Difficulty
- normal
Teaching Notes
Download this free fact family add sub within 20 fill blanks math worksheet. Uniquely generated with an answer key — great for homework, practice, or assessment.
Frequently Asked Questions
How do I use this Fact Family Add Sub Within 20 Fill Blanks 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.