Printable 40-Question Addition & Subtraction Worksheet for 8-Year-Olds (Grade 3) — 3-Digit with 3-, 2-, and 1-Digit Practice

Free worksheet covering multiple subjects for age 8 students. Created with Learning Corner's AI-powered tools.

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Instructions

Solve the addition (+) and subtraction (-) problems below. Look at the sign carefully for each question! Write your answer in the space provided.

 456
+ 231
 
 987
- 123
 
 123
+  45
 
 452
-  38
 
 234
+   5
 
 780
-   6
 
 789
+ 123
 
 543
- 289
 
 678
+  21
 
 790
-  81
 
 876
+   7
 
 567
-   9
 
 345
+ 567
 
 812
- 456
 
 309
+  88
 
 321
-  19
 
 408
+   9
 
 211
-   8
 
 602
+ 199
 
 600
- 123
 
 258
+ 311
 
 777
- 345
 
 915
+  76
 
 675
-  75
 
 191
+   8
 
 999
-   5
 
 814
+ 158
 
 431
- 219
 
 444
+  52
 
 263
-  44
 
 562
+   6
 
 143
-   7
 
 555
+ 222
 
 950
- 548
 
 281
+  19
 
 905
-  96
 
 725
+   5
 
 345
-   2
 
 537
+  60
 
 189
-  56
 



Answer Key

1. 687 2. 864 3. 168 4. 414
5. 239 6. 774 7. 912 8. 254
9. 699 10. 709 11. 883 12. 558
13. 912 14. 356 15. 397 16. 302
17. 417 18. 203 19. 801 20. 477
21. 569 22. 432 23. 991 24. 600
25. 199 26. 994 27. 972 28. 212
29. 496 30. 219 31. 568 32. 136
33. 777 34. 402 35. 300 36. 809
37. 730 38. 343 39. 597 40. 133
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