Fact Family Mixed Within 20 Fill Blanks — Set 21
Write the fact family for 4, 9, 13:
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Answer: 4 + 9 = 13; 9 + 4 = 13; 13 - 4 = 9; 13 - 9 = 4
- SubType
- fact-family
- Facts
- 4 + 9 = 13
- 9 + 4 = 13
- 13 - 4 = 9
- 13 - 9 = 4
- Difficulty
- normal
Write the fact family for 11, 9, 20:
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Answer: 11 + 9 = 20; 9 + 11 = 20; 20 - 11 = 9; 20 - 9 = 11
- SubType
- fact-family
- Facts
- 11 + 9 = 20
- 9 + 11 = 20
- 20 - 11 = 9
- 20 - 9 = 11
- 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 6, 7, 13:
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Answer: 6 + 7 = 13; 7 + 6 = 13; 13 - 6 = 7; 13 - 7 = 6
- SubType
- fact-family
- Facts
- 6 + 7 = 13
- 7 + 6 = 13
- 13 - 6 = 7
- 13 - 7 = 6
- Difficulty
- normal
Write the fact family for 12, 6, 18:
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Answer: 12 + 6 = 18; 6 + 12 = 18; 18 - 12 = 6; 18 - 6 = 12
- SubType
- fact-family
- Facts
- 12 + 6 = 18
- 6 + 12 = 18
- 18 - 12 = 6
- 18 - 6 = 12
- Difficulty
- normal
Write the fact family for 15, 2, 17:
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Answer: 15 + 2 = 17; 2 + 15 = 17; 17 - 15 = 2; 17 - 2 = 15
- SubType
- fact-family
- Facts
- 15 + 2 = 17
- 2 + 15 = 17
- 17 - 15 = 2
- 17 - 2 = 15
- Difficulty
- normal
Teaching Notes
Download this free fact family mixed 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 Mixed 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.