Fact Family Add Sub Within 20 Fill Blanks — Set 63
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 12, 7, 19:
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Answer: 12 + 7 = 19; 7 + 12 = 19; 19 - 12 = 7; 19 - 7 = 12
- SubType
- fact-family
- Facts
- 12 + 7 = 19
- 7 + 12 = 19
- 19 - 12 = 7
- 19 - 7 = 12
- Difficulty
- normal
Write the fact family for 2, 11, 13:
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Answer: 2 + 11 = 13; 11 + 2 = 13; 13 - 2 = 11; 13 - 11 = 2
- SubType
- fact-family
- Facts
- 2 + 11 = 13
- 11 + 2 = 13
- 13 - 2 = 11
- 13 - 11 = 2
- Difficulty
- normal
Write the fact family for 8, 11, 19:
Show answer
Answer: 8 + 11 = 19; 11 + 8 = 19; 19 - 8 = 11; 19 - 11 = 8
- SubType
- fact-family
- Facts
- 8 + 11 = 19
- 11 + 8 = 19
- 19 - 8 = 11
- 19 - 11 = 8
- Difficulty
- normal
Write the fact family for 11, 9, 20:
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Answer: 11 + 9 = 20; 9 + 11 = 20; 20 - 11 = 9; 20 - 9 = 11
- SubType
- fact-family
- Facts
- 11 + 9 = 20
- 9 + 11 = 20
- 20 - 11 = 9
- 20 - 9 = 11
- Difficulty
- normal
Write the fact family for 15, 5, 20:
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Answer: 15 + 5 = 20; 5 + 15 = 20; 20 - 15 = 5; 20 - 5 = 15
- SubType
- fact-family
- Facts
- 15 + 5 = 20
- 5 + 15 = 20
- 20 - 15 = 5
- 20 - 5 = 15
- 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.