Fact Family Add Sub Within 20 Fill Blanks — Set 27
Write the fact family for 13, 5, 18:
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Answer: 13 + 5 = 18; 5 + 13 = 18; 18 - 13 = 5; 18 - 5 = 13
- SubType
- fact-family
- Facts
- 13 + 5 = 18
- 5 + 13 = 18
- 18 - 13 = 5
- 18 - 5 = 13
- Difficulty
- normal
Write the fact family for 1, 15, 16:
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Answer: 1 + 15 = 16; 15 + 1 = 16; 16 - 1 = 15; 16 - 15 = 1
- SubType
- fact-family
- Facts
- 1 + 15 = 16
- 15 + 1 = 16
- 16 - 1 = 15
- 16 - 15 = 1
- Difficulty
- normal
Write the fact family for 13, 2, 15:
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Answer: 13 + 2 = 15; 2 + 13 = 15; 15 - 13 = 2; 15 - 2 = 13
- SubType
- fact-family
- Facts
- 13 + 2 = 15
- 2 + 13 = 15
- 15 - 13 = 2
- 15 - 2 = 13
- Difficulty
- normal
Write the fact family for 12, 3, 15:
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Answer: 12 + 3 = 15; 3 + 12 = 15; 15 - 12 = 3; 15 - 3 = 12
- SubType
- fact-family
- Facts
- 12 + 3 = 15
- 3 + 12 = 15
- 15 - 12 = 3
- 15 - 3 = 12
- Difficulty
- normal
Write the fact family for 14, 5, 19:
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Answer: 14 + 5 = 19; 5 + 14 = 19; 19 - 14 = 5; 19 - 5 = 14
- SubType
- fact-family
- Facts
- 14 + 5 = 19
- 5 + 14 = 19
- 19 - 14 = 5
- 19 - 5 = 14
- Difficulty
- normal
Write the fact family for 8, 8, 16:
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Answer: 8 + 8 = 16; 8 + 8 = 16; 16 - 8 = 8; 16 - 8 = 8
- SubType
- fact-family
- Facts
- 8 + 8 = 16
- 8 + 8 = 16
- 16 - 8 = 8
- 16 - 8 = 8
- 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.