Fact Family Add Sub Within 20 Fill Blanks — Set 32
Write the fact family for 9, 11, 20:
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Answer: 9 + 11 = 20; 11 + 9 = 20; 20 - 9 = 11; 20 - 11 = 9
- SubType
- fact-family
- Facts
- 9 + 11 = 20
- 11 + 9 = 20
- 20 - 9 = 11
- 20 - 11 = 9
- Difficulty
- normal
Write the fact family for 16, 1, 17:
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Answer: 16 + 1 = 17; 1 + 16 = 17; 17 - 16 = 1; 17 - 1 = 16
- SubType
- fact-family
- Facts
- 16 + 1 = 17
- 1 + 16 = 17
- 17 - 16 = 1
- 17 - 1 = 16
- Difficulty
- normal
Write the fact family for 18, 2, 20:
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Answer: 18 + 2 = 20; 2 + 18 = 20; 20 - 18 = 2; 20 - 2 = 18
- SubType
- fact-family
- Facts
- 18 + 2 = 20
- 2 + 18 = 20
- 20 - 18 = 2
- 20 - 2 = 18
- Difficulty
- normal
Write the fact family for 4, 14, 18:
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Answer: 4 + 14 = 18; 14 + 4 = 18; 18 - 4 = 14; 18 - 14 = 4
- SubType
- fact-family
- Facts
- 4 + 14 = 18
- 14 + 4 = 18
- 18 - 4 = 14
- 18 - 14 = 4
- Difficulty
- normal
Write the fact family for 15, 4, 19:
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Answer: 15 + 4 = 19; 4 + 15 = 19; 19 - 15 = 4; 19 - 4 = 15
- SubType
- fact-family
- Facts
- 15 + 4 = 19
- 4 + 15 = 19
- 19 - 15 = 4
- 19 - 4 = 15
- Difficulty
- normal
Write the fact family for 11, 4, 15:
Show answer
Answer: 11 + 4 = 15; 4 + 11 = 15; 15 - 11 = 4; 15 - 4 = 11
- SubType
- fact-family
- Facts
- 11 + 4 = 15
- 4 + 11 = 15
- 15 - 11 = 4
- 15 - 4 = 11
- 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.