Fact Family Add Sub Within 20 Fill Blanks — Set 77
Write the fact family for 19, 1, 20:
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Answer: 19 + 1 = 20; 1 + 19 = 20; 20 - 19 = 1; 20 - 1 = 19
- SubType
- fact-family
- Facts
- 19 + 1 = 20
- 1 + 19 = 20
- 20 - 19 = 1
- 20 - 1 = 19
- Difficulty
- normal
Write the fact family for 6, 11, 17:
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Answer: 6 + 11 = 17; 11 + 6 = 17; 17 - 6 = 11; 17 - 11 = 6
- SubType
- fact-family
- Facts
- 6 + 11 = 17
- 11 + 6 = 17
- 17 - 6 = 11
- 17 - 11 = 6
- Difficulty
- normal
Write the fact family for 6, 14, 20:
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Answer: 6 + 14 = 20; 14 + 6 = 20; 20 - 6 = 14; 20 - 14 = 6
- SubType
- fact-family
- Facts
- 6 + 14 = 20
- 14 + 6 = 20
- 20 - 6 = 14
- 20 - 14 = 6
- Difficulty
- normal
Write the fact family for 18, 1, 19:
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Answer: 18 + 1 = 19; 1 + 18 = 19; 19 - 18 = 1; 19 - 1 = 18
- SubType
- fact-family
- Facts
- 18 + 1 = 19
- 1 + 18 = 19
- 19 - 18 = 1
- 19 - 1 = 18
- Difficulty
- normal
Write the fact family for 9, 10, 19:
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Answer: 9 + 10 = 19; 10 + 9 = 19; 19 - 9 = 10; 19 - 10 = 9
- SubType
- fact-family
- Facts
- 9 + 10 = 19
- 10 + 9 = 19
- 19 - 9 = 10
- 19 - 10 = 9
- Difficulty
- normal
Write the fact family for 4, 11, 15:
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Answer: 4 + 11 = 15; 11 + 4 = 15; 15 - 4 = 11; 15 - 11 = 4
- SubType
- fact-family
- Facts
- 4 + 11 = 15
- 11 + 4 = 15
- 15 - 4 = 11
- 15 - 11 = 4
- 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.