Fact Family Add Sub Within 20 Write All — Set 80
Write the fact family for 2, 1, 3:
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Answer: 2 + 1 = 3; 1 + 2 = 3; 3 - 2 = 1; 3 - 1 = 2
- SubType
- fact-family
- Facts
- 2 + 1 = 3
- 1 + 2 = 3
- 3 - 2 = 1
- 3 - 1 = 2
- Difficulty
- normal
Write the fact family for 7, 12, 19:
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Answer: 7 + 12 = 19; 12 + 7 = 19; 19 - 7 = 12; 19 - 12 = 7
- SubType
- fact-family
- Facts
- 7 + 12 = 19
- 12 + 7 = 19
- 19 - 7 = 12
- 19 - 12 = 7
- Difficulty
- normal
Write the fact family for 3, 13, 16:
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Answer: 3 + 13 = 16; 13 + 3 = 16; 16 - 3 = 13; 16 - 13 = 3
- SubType
- fact-family
- Facts
- 3 + 13 = 16
- 13 + 3 = 16
- 16 - 3 = 13
- 16 - 13 = 3
- Difficulty
- normal
Write the fact family for 2, 18, 20:
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Answer: 2 + 18 = 20; 18 + 2 = 20; 20 - 2 = 18; 20 - 18 = 2
- SubType
- fact-family
- Facts
- 2 + 18 = 20
- 18 + 2 = 20
- 20 - 2 = 18
- 20 - 18 = 2
- Difficulty
- normal
Write the fact family for 6, 1, 7:
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Answer: 6 + 1 = 7; 1 + 6 = 7; 7 - 6 = 1; 7 - 1 = 6
- SubType
- fact-family
- Facts
- 6 + 1 = 7
- 1 + 6 = 7
- 7 - 6 = 1
- 7 - 1 = 6
- Difficulty
- normal
Write the fact family for 2, 9, 11:
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Answer: 2 + 9 = 11; 9 + 2 = 11; 11 - 2 = 9; 11 - 9 = 2
- SubType
- fact-family
- Facts
- 2 + 9 = 11
- 9 + 2 = 11
- 11 - 2 = 9
- 11 - 9 = 2
- Difficulty
- normal
Teaching Notes
Download this free fact family add sub within 20 write all 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 Write All 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.