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) 335 + 844 =

2) 561 + 139 =

3) 280 + 969 =

4) 737 + 494 =

5) 578 + 573 =

6) 720 + 793 =

7) 553 + 593 =

8) 551 + 665 =

9) 520 + 379 =

10) 528 + 988 =

11) 142 + 867 =

12) 155 + 706 =

13) 924 + 600 =

14) 531 + 315 =

15) 303 + 773 =

16) 672 + 645 =

17) 648 + 327 =

18) 891 + 902 =

19) 506 + 145 =

20) 720 + 930 =

21) 884 + 233 =

22) 647 + 586 =

23) 943 + 352 =

24) 788 + 440 =

25) 726 + 477 =

26) 865 + 986 =

27) 142 + 721 =

28) 126 + 180 =

29) 820 + 374 =

30) 990 + 312 =

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.