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Grade 1 Missing Addend Worksheets

Find the number that finishes an addition, like 6 + __ = 13.

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 missing numbers skills, see all missing numbers worksheets.

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Missing Numbers · 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

Missing Numbers Practice

Grade 1 • Missing Addend • Bridging ten
Name:Date:

Write the missing number in each sum.

  1. 1) ___ + 17 = 20
  2. 2) ___ + 9 = 11
  3. 3) ___ + 9 = 14
  1. 4) ___ + 7 = 13
  2. 5) ___ + 8 = 11
  3. 6) ___ + 7 = 15
  1. 7) ___ + 7 = 11
  2. 8) ___ + 18 = 20
  3. 9) ___ + 8 = 14
  1. 10) ___ + 9 = 17
  2. 11) ___ + 5 = 11
  3. 12) ___ + 3 = 12
  1. 13) ___ + 15 = 20
  2. 14) ___ + 8 = 20
  3. 15) ___ + 19 = 20
  1. 16) ___ + 8 = 12
  2. 17) ___ + 2 = 11
  3. 18) ___ + 9 = 20
  1. 19) ___ + 7 = 14
  2. 20) ___ + 7 = 12
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Page 1 of 2

Answer Key

  1. 1. 3
  2. 2. 2
  3. 3. 5
  4. 4. 6
  1. 5. 3
  2. 6. 8
  3. 7. 4
  4. 8. 2
  1. 9. 6
  2. 10. 8
  3. 11. 6
  4. 12. 9
  1. 13. 5
  2. 14. 12
  3. 15. 1
  4. 16. 4
  1. 17. 9
  2. 18. 11
  3. 19. 7
  4. 20. 5
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Page 2 of 2

What each level generates

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

  1. Level 1Nothing to carry
  2. Level 2Bridging ten
  3. Level 3Three numbers

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 missing numbers skills

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

Frequently asked questions

▸Why are missing number problems important in Grade 1?

They teach the equals sign as a balance rather than a "the answer goes here" signal, and they force children to use the link between addition and subtraction. Both ideas are the foundation of later algebra.

▸Should addition and subtraction blanks be mixed on one sheet?

Once each operation is solid on its own, yes — mixing is the point. Fact Families is the sheet that interleaves both, so children must read each equation instead of running on autopilot, and Balance the Equation does the same across an equals sign.

▸How many problems suit a Grade 1 session?

10–12 works for most first graders. Set the exact count with the stepper; short, frequent sheets build more fluency than long occasional ones.

▸Does the answer key print on the same page?

No — tick the answer key box and the key prints on its own final page, numbered to match the problems, so you can keep it aside while your child works.

▸What is the difference between Shuffle and reusing the link?

Shuffle generates brand-new problems at the same settings; the link reproduces the exact same sheet, problems and key included. Use the link for a re-test, Shuffle for fresh daily practice.