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Grade 3 Adding Tens and Hundreds Worksheets

Mental jumps: counting on in tens or hundreds and adding a whole one.

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 addition skills, see all addition worksheets.

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Addition · Grade 3

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

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Grade 3 · 2 pages · A4

Addition Practice

Grade 3 • Adding Tens and Hundreds • Add a hundred
Name:Date:

Add the whole number to each one.

  1. 1) 831 + 100 =
  2. 2) 314 + 100 =
  3. 3) 873 + 100 =
  1. 4) 185 + 100 =
  2. 5) 252 + 100 =
  3. 6) 522 + 100 =
  1. 7) 248 + 100 =
  2. 8) 222 + 100 =
  3. 9) 600 + 100 =
  1. 10) 827 + 100 =
  2. 11) 183 + 100 =
  3. 12) 445 + 100 =
  1. 13) 720 + 100 =
  2. 14) 169 + 100 =
  3. 15) 595 + 100 =
  1. 16) 363 + 100 =
  2. 17) 598 + 100 =
  3. 18) 373 + 100 =
  1. 19) 788 + 100 =
  2. 20) 436 + 100 =
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Page 1 of 2

Answer Key

  1. 1. 931
  2. 2. 414
  3. 3. 973
  4. 4. 285
  1. 5. 352
  2. 6. 622
  3. 7. 348
  4. 8. 322
  1. 9. 700
  2. 10. 927
  3. 11. 283
  4. 12. 545
  1. 13. 820
  2. 14. 269
  3. 15. 695
  4. 16. 463
  1. 17. 698
  2. 18. 473
  3. 19. 888
  4. 20. 536
Finished already?Get more worksheets for free at www.kidoslab.com
Page 2 of 2

What each level generates

Grade 3 adding tens and hundreds — the exact skill behind each difficulty setting, straight from the generator.

  1. Level 1Count on in hundreds
  2. Level 2Add a hundred
  3. Level 3How many hundreds

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 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 3 student be able to do?

Most curricula expect fluent multi-digit addition with regrouping by year-end, alongside mental strategies like rounding and compensation. The Add With Regrouping skill targets exactly this stage.

▸How do I run the same test for my whole class?

Generate one worksheet and share its link — every student gets the identical problems in the identical order. Print one answer key page and it covers the whole set.

▸How many problems are right for a timed Grade 3 check?

10–15 regrouping problems is a fair timed set. Use the stepper to fix the count, and keep the link so the re-test weeks later uses the very same sheet.

▸Is the answer key on the same page as the problems?

No — it prints on its own separate page with numbered answers, so you can withhold it during work and hand it over for self-checking afterwards.

▸Can I add a student's name to the sheet?

Yes. Type a name in the name field and it prints at the top of the worksheet. The name is only used to render your PDF and never leaves your device.