Fact Family Add Sub Within 20 Fill Blanks — Set 85
Write the fact family for 11, 1, 12:
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Answer: 11 + 1 = 12; 1 + 11 = 12; 12 - 11 = 1; 12 - 1 = 11
- SubType
- fact-family
- Facts
- 11 + 1 = 12
- 1 + 11 = 12
- 12 - 11 = 1
- 12 - 1 = 11
- Difficulty
- normal
Write the fact family for 7, 13, 20:
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Answer: 7 + 13 = 20; 13 + 7 = 20; 20 - 7 = 13; 20 - 13 = 7
- SubType
- fact-family
- Facts
- 7 + 13 = 20
- 13 + 7 = 20
- 20 - 7 = 13
- 20 - 13 = 7
- 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 2, 17, 19:
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Answer: 2 + 17 = 19; 17 + 2 = 19; 19 - 2 = 17; 19 - 17 = 2
- SubType
- fact-family
- Facts
- 2 + 17 = 19
- 17 + 2 = 19
- 19 - 2 = 17
- 19 - 17 = 2
- Difficulty
- normal
Write the fact family for 11, 5, 16:
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Answer: 11 + 5 = 16; 5 + 11 = 16; 16 - 11 = 5; 16 - 5 = 11
- SubType
- fact-family
- Facts
- 11 + 5 = 16
- 5 + 11 = 16
- 16 - 11 = 5
- 16 - 5 = 11
- 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
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.