Fact Family Add Sub Within 20 Fill Blanks — Set 66
Write the fact family for 7, 10, 17:
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Answer: 7 + 10 = 17; 10 + 7 = 17; 17 - 7 = 10; 17 - 10 = 7
- SubType
- fact-family
- Facts
- 7 + 10 = 17
- 10 + 7 = 17
- 17 - 7 = 10
- 17 - 10 = 7
- Difficulty
- normal
Write the fact family for 13, 3, 16:
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Answer: 13 + 3 = 16; 3 + 13 = 16; 16 - 13 = 3; 16 - 3 = 13
- SubType
- fact-family
- Facts
- 13 + 3 = 16
- 3 + 13 = 16
- 16 - 13 = 3
- 16 - 3 = 13
- Difficulty
- normal
Write the fact family for 5, 3, 8:
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Answer: 5 + 3 = 8; 3 + 5 = 8; 8 - 5 = 3; 8 - 3 = 5
- SubType
- fact-family
- Facts
- 5 + 3 = 8
- 3 + 5 = 8
- 8 - 5 = 3
- 8 - 3 = 5
- Difficulty
- normal
Write the fact family for 8, 11, 19:
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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 9, 1, 10:
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Answer: 9 + 1 = 10; 1 + 9 = 10; 10 - 9 = 1; 10 - 1 = 9
- SubType
- fact-family
- Facts
- 9 + 1 = 10
- 1 + 9 = 10
- 10 - 9 = 1
- 10 - 1 = 9
- Difficulty
- normal
Write the fact family for 5, 8, 13:
Show answer
Answer: 5 + 8 = 13; 8 + 5 = 13; 13 - 5 = 8; 13 - 8 = 5
- SubType
- fact-family
- Facts
- 5 + 8 = 13
- 8 + 5 = 13
- 13 - 5 = 8
- 13 - 8 = 5
- 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.