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Grade 3 Missing Number Worksheets

Fill in the number that makes the subtraction true, wherever the gap is.

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 3 subtraction skills, see all subtraction worksheets.

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Subtraction · Grade 3

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

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Grade 3 · 2 pages · A4

Subtraction Practice

Grade 3 • Missing Number • What we started with
Name:Date:

Write the number we started with.

  1. 1) ___ − 645 = 10
  2. 2) ___ − 110 = 420
  1. 3) ___ − 400 = 280
  2. 4) ___ − 230 = 523
  1. 5) ___ − 103 = 423
  2. 6) ___ − 464 = 3
  1. 7) ___ − 231 = 230
  2. 8) ___ − 403 = 214
  1. 9) ___ − 210 = 402
  2. 10) ___ − 372 = 315
  1. 11) ___ − 300 = 137
  2. 12) ___ − 316 = 132
  1. 13) ___ − 643 = 124
  2. 14) ___ − 402 = 301
  1. 15) ___ − 331 = 420
  2. 16) ___ − 224 = 454
  1. 17) ___ − 300 = 210
  2. 18) ___ − 460 = 9
  1. 19) ___ − 327 = 101
  2. 20) ___ − 201 = 448
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Page 1 of 2

Answer Key

  1. 1. 655
  2. 2. 530
  3. 3. 680
  4. 4. 753
  1. 5. 526
  2. 6. 467
  3. 7. 461
  4. 8. 617
  1. 9. 612
  2. 10. 687
  3. 11. 437
  4. 12. 448
  1. 13. 767
  2. 14. 703
  3. 15. 751
  4. 16. 678
  1. 17. 510
  2. 18. 469
  3. 19. 428
  4. 20. 649
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Page 2 of 2

What each level generates

Grade 3 missing number — the exact skill behind each difficulty setting, straight from the generator.

  1. Level 1What was taken away
  2. Level 2What we started with
  3. Level 3With regrouping

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 3 subtraction skills

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

Frequently asked questions

▸What subtraction is taught in Grade 3?

Fluent subtraction within 1,000 using the standard written algorithm, including regrouping across zeros. Most curricula also expect students to check subtraction by adding back.

▸How do students check subtraction with addition?

Add the answer to the number that was subtracted; you should get the starting number back. For 305 − 178 = 127, check that 127 + 178 = 305. It catches most borrowing errors on the spot.

▸Why does my Grade 3 child struggle with zeros in subtraction?

Borrowing across a zero needs two regrouping steps instead of one, which overloads a fragile method. Slow one problem right down, narrate the two borrows, then let the sheet provide repetition.

▸How many problems make a good Grade 3 session?

10–15. Regrouping problems take several steps each, so a short accurate set builds more than a long careless one. The question-count stepper sizes the sheet to your session.

▸Does the answer key show the working steps?

The key lists final answers, numbered to match the problems, on its own separate page — easy to hold back during work and quick to mark against afterwards.