Grade 3 Addition Within 1000 Worksheet

Free printable addition within 1000 worksheet for grade 3 — 12 problems with an answer key. Print or save as PDF.

Math · Grade 3

Addition Within 1000

Name Date Score

1. 359 + 585 =

2. 403 + 55 =

3. 733 + 172 =

4. 731 + 139 =

5. 50 + 773 =

6. 128 + 420 =

7. 718 + 134 =

8. 959 + 12 =

9. 246 + 272 =

10. 522 + 69 =

11. 704 + 294 =

12. 15 + 915 =

About This Worksheet

This free printable worksheet gives grade 3 learners 12 addition problems to practice, with a built-in answer key. Ideal for homework, morning work, or a quick review. Press "New Problems" for a fresh set anytime.

How to use it: click Print / Save as PDF to print or keep a digital copy. Click Show Answers to check the work (answers never print). Looking for a fun break? Try our free online games.