Advanced 3-Digit Addition – Free Math Exercises

Ready for big numbers? Our 3-digit addition worksheets strengthen mental math and problem-solving. Great for students aiming for excellence!

1) 515 + 374 =

2) 592 + 620 =

3) 249 + 786 =

4) 776 + 645 =

5) 747 + 273 =

6) 893 + 311 =

7) 465 + 267 =

8) 120 + 512 =

9) 302 + 175 =

10) 336 + 377 =

11) 129 + 343 =

12) 270 + 978 =

13) 567 + 401 =

14) 582 + 358 =

15) 887 + 629 =

16) 824 + 688 =

17) 573 + 666 =

18) 395 + 791 =

19) 963 + 212 =

20) 377 + 302 =

21) 189 + 172 =

22) 409 + 261 =

23) 151 + 864 =

24) 406 + 303 =

25) 852 + 259 =

26) 841 + 127 =

27) 917 + 384 =

28) 107 + 373 =

29) 663 + 983 =

30) 977 + 230 =

To view the results click on the "Show results" button.
To print the exercise sheet click on the "Print" button.
To generate a new exercise sheet click on the "Generate new worksheet" button.

Find also

Master Addition – Free Math Practice Worksheets & Exercises

All Advanced 3-Digit Addition – Free Math Exercises and worksheets are completely free to use and reuse. These resources are designed to enhance math skills and mastery of Advanced 3-Digit Addition – Free Math Exercises concepts. Perfect for students, teachers, and parents, these free worksheets support effective learning and continuous practice in mathematics.