Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 627 · 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.? − 298 = 589
2. 2.167 + ? = 381
3. 3.A school has 541 children. 201 of them are girls. How many boys are there?
4. 4.A school has 465 children. 267 of them are girls. How many boys are there?
5. 5.428 − ? = 2
6. 6.299 − 224 =
7. 7.A school has 783 children. 209 of them are girls. How many boys are there?
8. 8.A school has 675 children. 446 of them are girls. How many boys are there?
9. 9.806 + 190 =
10. 10.807 − 272 =
11. 11.551 + 392 =
12. 12.865 + 119 =
13. 13.862 − 524 =
14. 14.749 + ? = 943
15. 15.570 − 522 =
16. 16.216 + 591 =
17. 17.? − 658 = 264
18. 18.398 + 255 =
19. 19.? + 648 = 964
20. 20.320 + 541 =
21. 21.764 − 616 =
22. 22.? − 132 = 442
23. 23.? − 186 = 351
24. 24.A train has 492 people in the front coaches and 188 people in the back coaches. How many people are on the train?
25. 25.554 + ? = 665
26. 26.A school has 401 children. 183 of them are girls. How many boys are there?
27. 27.? + 895 = 998
28. 28.327 − 273 =
29. 29.? − 652 = 285
30. 30.A train has 313 people in the front coaches and 612 people in the back coaches. How many people are on the train?
31. 31.? − 185 = 494
32. 32.459 − 456 =
33. 33.? − 223 = 671
34. 34.613 + 261 =
35. 35.260 + ? = 419
36. 36.242 − 104 =
37. 37.431 − 105 =
38. 38.307 − 104 =
39. 39.860 + 126 =
40. 40.417 − 416 =

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