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) 157 + 252 =

2) 256 + 789 =

3) 143 + 778 =

4) 229 + 670 =

5) 847 + 629 =

6) 978 + 868 =

7) 351 + 879 =

8) 375 + 397 =

9) 889 + 508 =

10) 138 + 711 =

11) 953 + 957 =

12) 424 + 924 =

13) 616 + 350 =

14) 374 + 201 =

15) 933 + 507 =

16) 909 + 176 =

17) 852 + 785 =

18) 996 + 502 =

19) 328 + 726 =

20) 698 + 978 =

21) 507 + 998 =

22) 426 + 521 =

23) 453 + 591 =

24) 579 + 198 =

25) 202 + 103 =

26) 841 + 586 =

27) 423 + 210 =

28) 539 + 320 =

29) 326 + 528 =

30) 480 + 861 =

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.