Fact Family Add Sub Within 20 Write All — Set 21
Write the fact family for 18, 1, 19:
Show answer
Answer: 18 + 1 = 19; 1 + 18 = 19; 19 - 18 = 1; 19 - 1 = 18
- SubType
- fact-family
- Facts
- 18 + 1 = 19
- 1 + 18 = 19
- 19 - 18 = 1
- 19 - 1 = 18
- Difficulty
- normal
Write the fact family for 15, 2, 17:
Show answer
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
Write the fact family for 9, 4, 13:
Show answer
Answer: 9 + 4 = 13; 4 + 9 = 13; 13 - 9 = 4; 13 - 4 = 9
- SubType
- fact-family
- Facts
- 9 + 4 = 13
- 4 + 9 = 13
- 13 - 9 = 4
- 13 - 4 = 9
- Difficulty
- normal
Write the fact family for 3, 11, 14:
Show answer
Answer: 3 + 11 = 14; 11 + 3 = 14; 14 - 3 = 11; 14 - 11 = 3
- SubType
- fact-family
- Facts
- 3 + 11 = 14
- 11 + 3 = 14
- 14 - 3 = 11
- 14 - 11 = 3
- Difficulty
- normal
Write the fact family for 15, 4, 19:
Show answer
Answer: 15 + 4 = 19; 4 + 15 = 19; 19 - 15 = 4; 19 - 4 = 15
- SubType
- fact-family
- Facts
- 15 + 4 = 19
- 4 + 15 = 19
- 19 - 15 = 4
- 19 - 4 = 15
- Difficulty
- normal
Write the fact family for 7, 6, 13:
Show answer
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
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.