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) 421 + 445 =

2) 107 + 754 =

3) 914 + 622 =

4) 840 + 712 =

5) 559 + 170 =

6) 456 + 811 =

7) 844 + 225 =

8) 715 + 225 =

9) 780 + 601 =

10) 796 + 673 =

11) 928 + 650 =

12) 843 + 206 =

13) 420 + 214 =

14) 853 + 236 =

15) 535 + 378 =

16) 161 + 557 =

17) 754 + 682 =

18) 599 + 573 =

19) 123 + 162 =

20) 153 + 838 =

21) 254 + 226 =

22) 938 + 217 =

23) 799 + 782 =

24) 249 + 783 =

25) 880 + 324 =

26) 247 + 765 =

27) 508 + 491 =

28) 112 + 534 =

29) 469 + 100 =

30) 285 + 375 =

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.