Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 339 · 40 sums

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

1. 1.437 + 545 =
2. 2.A school has 401 children. 136 of them are girls. How many boys are there?
3. 3.449 + 521 =
4. 4.813 − 395 =
5. 5.661 − 324 =
6. 6.400 − ? = 64
7. 7.504 + 417 =
8. 8.918 − ? = 589
9. 9.767 − 123 =
10. 10.729 − 294 =
11. 11.A train has 176 people in the front coaches and 696 people in the back coaches. How many people are on the train?
12. 12.853 − 435 =
13. 13.263 + 583 =
14. 14.629 + 149 =
15. 15.206 + 451 =
16. 16.967 − 786 =
17. 17.552 − ? = 17
18. 18.328 − 316 =
19. 19.? − 330 = 6
20. 20.813 + 118 =
21. 21.? − 523 = 99
22. 22.? − 154 = 844
23. 23.423 − 356 =
24. 24.? − 104 = 308
25. 25.A train has 276 people in the front coaches and 457 people in the back coaches. How many people are on the train?
26. 26.A school has 446 children. 256 of them are girls. How many boys are there?
27. 27.? + 440 = 597
28. 28.A school has 783 children. 117 of them are girls. How many boys are there?
29. 29.374 + 594 =
30. 30.200 + 597 =
31. 31.453 + 189 =
32. 32.552 + 284 =
33. 33.373 + 387 =
34. 34.A train has 712 people in the front coaches and 108 people in the back coaches. How many people are on the train?
35. 35.? + 390 = 842
36. 36.A school has 332 children. 241 of them are girls. How many boys are there?
37. 37.961 − 656 =
38. 38.455 + ? = 874
39. 39.A school has 941 children. 213 of them are girls. How many boys are there?
40. 40.911 − 749 =

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets