Fact Family Add Sub Within 20 Fill Blanks — Set 21
Write the fact family for 7, 6, 13:
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Answer: 7 + 6 = 13; 6 + 7 = 13; 13 - 7 = 6; 13 - 6 = 7
- SubType
- fact-family
- Facts
- 7 + 6 = 13
- 6 + 7 = 13
- 13 - 7 = 6
- 13 - 6 = 7
- Difficulty
- normal
Write the fact family for 1, 6, 7:
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Answer: 1 + 6 = 7; 6 + 1 = 7; 7 - 1 = 6; 7 - 6 = 1
- SubType
- fact-family
- Facts
- 1 + 6 = 7
- 6 + 1 = 7
- 7 - 1 = 6
- 7 - 6 = 1
- Difficulty
- normal
Write the fact family for 11, 4, 15:
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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
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 10, 4, 14:
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Answer: 10 + 4 = 14; 4 + 10 = 14; 14 - 10 = 4; 14 - 4 = 10
- SubType
- fact-family
- Facts
- 10 + 4 = 14
- 4 + 10 = 14
- 14 - 10 = 4
- 14 - 4 = 10
- Difficulty
- normal
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
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.