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3rd Grade Addition Worksheet Generator
Create a printable 3rd grade addition worksheet for ages 8–9 — 20 fresh problems (100–899 and 10–899 (answers ≤ 1,000)) every time you click, with a separate answer-key page. Aligned to Common Core 3.NBT.A.2 — add within 1,000.
Worksheet generator
3rd Grade Addition
3.NBT.A.2 — add within 1,000
Name: ________________Date: __________Score: ____ / 20
- 1.406+90
- 2.169+429
- 3.269+477
- 4.791+203
- 5.101+701
- 6.220+692
- 7.528+236
- 8.518+412
- 9.741+98
- 10.298+630
- 11.811+45
- 12.199+714
- 13.119+157
- 14.271+682
- 15.457+323
- 16.139+165
- 17.484+219
- 18.583+223
- 19.166+787
- 20.703+143
Answer key — 3rd Grade Addition
- 1. 406 + 90 = 496
- 2. 169 + 429 = 598
- 3. 269 + 477 = 746
- 4. 791 + 203 = 994
- 5. 101 + 701 = 802
- 6. 220 + 692 = 912
- 7. 528 + 236 = 764
- 8. 518 + 412 = 930
- 9. 741 + 98 = 839
- 10. 298 + 630 = 928
- 11. 811 + 45 = 856
- 12. 199 + 714 = 913
- 13. 119 + 157 = 276
- 14. 271 + 682 = 953
- 15. 457 + 323 = 780
- 16. 139 + 165 = 304
- 17. 484 + 219 = 703
- 18. 583 + 223 = 806
- 19. 166 + 787 = 953
- 20. 703 + 143 = 846
Sample problems
406 + 90 = 496169 + 429 = 598269 + 477 = 746791 + 203 = 994
How to use it in class
- Click New worksheet for a different set — ideal for daily fluency practice or differentiated copies.
- Print worksheet prints only the sheet; the answer key goes on its own page (untick to leave it out).
- Time students on repeated sheets to track fluency gains week by week.
Standards alignment
Number ranges follow the Common Core grade-level expectations (K: add/subtract within 10; Grade 1: within 20; Grade 2: within 100; Grade 3: within 1,000 and multiplication facts to 10 × 10; Grade 4: multi-digit; Grade 5: decimals to hundredths and fractions with unlike denominators; Grades 6–8: fraction division, ratios, integers and linear equations).
3rd Grade worksheets
| Worksheet | Number range | Standard |
|---|---|---|
| Addition | 100–899 and 10–899 (answers ≤ 1,000) | 3.NBT.A.2 — add within 1,000 |
| Subtraction | 100–999 and 10–899 | 3.NBT.A.2 — subtract within 1,000 |
| Multiplication | 0–10 × 0–10 | 3.OA.C.7 — multiply within 100 (facts to 10 × 10) |
| Division | facts up to 100 ÷ 10 | 3.OA.C.7 — divide within 100 |
Frequently asked questions
Are the worksheets free to print?
Yes — unlimited, free and with no sign-up. Use them in class, for homework or tutoring.
Is there an answer key?
Yes. Every worksheet prints with an answer key on a separate page; untick “Print answer key” to leave it out.
Do I get different problems each time?
Yes. Each click on “New worksheet” builds 20 new problems within the grade-level range, with no duplicates on a sheet.
What does 3rd grade addition cover?
3.NBT.A.2 — add within 1,000. This sheet uses 100–899 and 10–899 (answers ≤ 1,000).
Can I use it on a tablet?
Yes — or print to PDF from the print dialog to share digitally.