Workbook Detail
Fact Family Add Sub Within 20 Fill Blanks — Set 48
Write the fact family for 19, 1, 20:
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Answer: 19 + 1 = 20; 1 + 19 = 20; 20 - 19 = 1; 20 - 1 = 19
- SubType
- fact-family
- Facts
- 19 + 1 = 20
- 1 + 19 = 20
- 20 - 19 = 1
- 20 - 1 = 19
- Difficulty
- normal
Write the fact family for 17, 1, 18:
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Answer: 17 + 1 = 18; 1 + 17 = 18; 18 - 17 = 1; 18 - 1 = 17
- SubType
- fact-family
- Facts
- 17 + 1 = 18
- 1 + 17 = 18
- 18 - 17 = 1
- 18 - 1 = 17
- Difficulty
- normal
Write the fact family for 7, 6, 13:
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Answer: 7 + 6 = 13; 6 + 7 = 13; 13 - 7 = 6; 13 - 6 = 7
- SubType
- fact-family
- Facts
- 7 + 6 = 13
- 6 + 7 = 13
- 13 - 7 = 6
- 13 - 6 = 7
- 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
Write the fact family for 10, 9, 19:
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Answer: 10 + 9 = 19; 9 + 10 = 19; 19 - 10 = 9; 19 - 9 = 10
- SubType
- fact-family
- Facts
- 10 + 9 = 19
- 9 + 10 = 19
- 19 - 10 = 9
- 19 - 9 = 10
- 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.