Fact Family Add Sub Within 20 Fill Blanks — Set 45
Write the fact family for 4, 3, 7:
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Answer: 4 + 3 = 7; 3 + 4 = 7; 7 - 4 = 3; 7 - 3 = 4
- SubType
- fact-family
- Facts
- 4 + 3 = 7
- 3 + 4 = 7
- 7 - 4 = 3
- 7 - 3 = 4
- Difficulty
- normal
Write the fact family for 8, 10, 18:
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Answer: 8 + 10 = 18; 10 + 8 = 18; 18 - 8 = 10; 18 - 10 = 8
- SubType
- fact-family
- Facts
- 8 + 10 = 18
- 10 + 8 = 18
- 18 - 8 = 10
- 18 - 10 = 8
- Difficulty
- normal
Write the fact family for 5, 11, 16:
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Answer: 5 + 11 = 16; 11 + 5 = 16; 16 - 5 = 11; 16 - 11 = 5
- SubType
- fact-family
- Facts
- 5 + 11 = 16
- 11 + 5 = 16
- 16 - 5 = 11
- 16 - 11 = 5
- 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 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 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
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.