Workbook Detail
Fact Family Add Sub Within 20 Hard — Set 35
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
- hard
Write the fact family for 7, 3, 21:
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Answer: 7 × 3 = 21; 3 × 7 = 21; 21 ÷ 7 = 3; 21 ÷ 3 = 7
- SubType
- fact-family
- Facts
- 7 × 3 = 21
- 3 × 7 = 21
- 21 ÷ 7 = 3
- 21 ÷ 3 = 7
- Difficulty
- hard
Write the fact family for 5, 9, 45:
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Answer: 5 × 9 = 45; 9 × 5 = 45; 45 ÷ 5 = 9; 45 ÷ 9 = 5
- SubType
- fact-family
- Facts
- 5 × 9 = 45
- 9 × 5 = 45
- 45 ÷ 5 = 9
- 45 ÷ 9 = 5
- Difficulty
- hard
Write the fact family for 1, 5, 6:
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Answer: 1 + 5 = 6; 5 + 1 = 6; 6 - 1 = 5; 6 - 5 = 1
- SubType
- fact-family
- Facts
- 1 + 5 = 6
- 5 + 1 = 6
- 6 - 1 = 5
- 6 - 5 = 1
- Difficulty
- hard
Write the fact family for 11, 5, 55:
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Answer: 11 × 5 = 55; 5 × 11 = 55; 55 ÷ 11 = 5; 55 ÷ 5 = 11
- SubType
- fact-family
- Facts
- 11 × 5 = 55
- 5 × 11 = 55
- 55 ÷ 11 = 5
- 55 ÷ 5 = 11
- Difficulty
- hard
Write the fact family for 9, 8, 72:
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Answer: 9 × 8 = 72; 8 × 9 = 72; 72 ÷ 9 = 8; 72 ÷ 8 = 9
- SubType
- fact-family
- Facts
- 9 × 8 = 72
- 8 × 9 = 72
- 72 ÷ 9 = 8
- 72 ÷ 8 = 9
- Difficulty
- hard
Teaching Notes
Practice fact family add sub within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
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