Fact Family Add Sub Within 20 Fill Blanks — Set 39
Write the fact family for 16, 4, 20:
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Answer: 16 + 4 = 20; 4 + 16 = 20; 20 - 16 = 4; 20 - 4 = 16
- SubType
- fact-family
- Facts
- 16 + 4 = 20
- 4 + 16 = 20
- 20 - 16 = 4
- 20 - 4 = 16
- Difficulty
- normal
Write the fact family for 18, 2, 20:
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Answer: 18 + 2 = 20; 2 + 18 = 20; 20 - 18 = 2; 20 - 2 = 18
- SubType
- fact-family
- Facts
- 18 + 2 = 20
- 2 + 18 = 20
- 20 - 18 = 2
- 20 - 2 = 18
- Difficulty
- normal
Write the fact family for 14, 2, 16:
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Answer: 14 + 2 = 16; 2 + 14 = 16; 16 - 14 = 2; 16 - 2 = 14
- SubType
- fact-family
- Facts
- 14 + 2 = 16
- 2 + 14 = 16
- 16 - 14 = 2
- 16 - 2 = 14
- Difficulty
- normal
Write the fact family for 3, 12, 15:
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Answer: 3 + 12 = 15; 12 + 3 = 15; 15 - 3 = 12; 15 - 12 = 3
- SubType
- fact-family
- Facts
- 3 + 12 = 15
- 12 + 3 = 15
- 15 - 3 = 12
- 15 - 12 = 3
- Difficulty
- normal
Write the fact family for 3, 9, 12:
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Answer: 3 + 9 = 12; 9 + 3 = 12; 12 - 3 = 9; 12 - 9 = 3
- SubType
- fact-family
- Facts
- 3 + 9 = 12
- 9 + 3 = 12
- 12 - 3 = 9
- 12 - 9 = 3
- Difficulty
- normal
Write the fact family for 13, 1, 14:
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Answer: 13 + 1 = 14; 1 + 13 = 14; 14 - 13 = 1; 14 - 1 = 13
- SubType
- fact-family
- Facts
- 13 + 1 = 14
- 1 + 13 = 14
- 14 - 13 = 1
- 14 - 1 = 13
- 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.