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Grade 1 Missing Number Worksheets

Number bonds: find the part that has been hidden from the sum.

Every sheet below is generated fresh with a matching answer key. Pick one of the three levels, preview it, and print or download the PDF — no account, no watermark. For the other grade 1 addition skills, see all addition worksheets.

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Addition · Grade 1

Grade
Topic
SkillEach skill is a different kind of question, with its own levels.
Level
Questions
20

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Grade 1 · 2 pages · A4

Addition Practice

Grade 1 • Missing Number • The first part is missing
Name:Date:

Write the number that was added to.

  1. 1) ___ + 20 = 72
  2. 2) ___ + 41 = 97
  3. 3) ___ + 9 = 97
  1. 4) ___ + 27 = 81
  2. 5) ___ + 8 = 32
  3. 6) ___ + 46 = 91
  1. 7) ___ + 35 = 45
  2. 8) ___ + 43 = 49
  3. 9) ___ + 43 = 48
  1. 10) ___ + 7 = 81
  2. 11) ___ + 60 = 67
  3. 12) ___ + 80 = 95
  1. 13) ___ + 52 = 85
  2. 14) ___ + 3 = 97
  3. 15) ___ + 49 = 73
  1. 16) ___ + 60 = 76
  2. 17) ___ + 41 = 68
  3. 18) ___ + 29 = 51
  1. 19) ___ + 22 = 95
  2. 20) ___ + 37 = 91
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Page 1 of 2

Answer Key

  1. 1. 52
  2. 2. 56
  3. 3. 88
  4. 4. 54
  1. 5. 24
  2. 6. 45
  3. 7. 10
  4. 8. 6
  1. 9. 5
  2. 10. 74
  3. 11. 7
  4. 12. 15
  1. 13. 33
  2. 14. 94
  3. 15. 24
  4. 16. 16
  1. 17. 27
  2. 18. 22
  3. 19. 73
  4. 20. 54
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Page 2 of 2

What each level generates

Grade 1 missing number — the exact skill behind each difficulty setting, straight from the generator.

  1. Level 1Find the missing part
  2. Level 2The first part is missing
  3. Level 3Three parts to add

Grade levels follow the progression common to most English-language curricula — not one specific national curriculum. Every level shows exactly what it generates, so you can check the fit with your own program. See the full scope & sequence →

More Grade 1 addition skills

Each one generates a different kind of question, with its own three levels and answer key.

Frequently asked questions

▸What addition should a Grade 1 student know?

By year-end, most curricula expect fluency with sums to 10 and reliable addition within 20 using strategies like counting on and making ten. The Make Ten to Add skill drills that strategy directly, and Add Without Regrouping carries the same year on into column work.

▸How many problems should a 6-year-old do per sheet?

10–15 works well. Set the count with the stepper — short daily sheets beat one long weekly session for building fact fluency.

▸How does the answer key work?

Tick the answer key option before you download. The key prints on a separate page with numbered answers, so you can hold it back while your child works and check together afterwards.

▸Can two children get different worksheets at the same level?

Yes — press Shuffle between prints. Each press generates a brand-new problem set at the same skill and level, and each version has its own link if you want to reprint either one exactly.

▸Will this match what my child does at school?

The skills offered here — making ten, column addition without regrouping, adding whole tens, missing numbers and word problems — mirror the sequence most English-language curricula use, so the sheets slot alongside almost any Grade 1 program.