Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 823 · 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. 1.466 − ? = 217
2. 2.? + 469 = 706
3. 3.277 − ? = 174
4. 4.A train has 644 people in the front coaches and 247 people in the back coaches. How many people are on the train?
5. 5.774 − 372 =
6. 6.288 + 564 =
7. 7.A school has 201 children. 192 of them are girls. How many boys are there?
8. 8.985 − 499 =
9. 9.? + 395 = 955
10. 10.A train has 876 people in the front coaches and 111 people in the back coaches. How many people are on the train?
11. 11.616 − ? = 137
12. 12.A school has 515 children. 203 of them are girls. How many boys are there?
13. 13.862 − 444 =
14. 14.268 + ? = 450
15. 15.A train has 618 people in the front coaches and 204 people in the back coaches. How many people are on the train?
16. 16.A school has 653 children. 509 of them are girls. How many boys are there?
17. 17.502 − 487 =
18. 18.705 − 428 =
19. 19.922 − 226 =
20. 20.459 + ? = 610
21. 21.478 + 448 =
22. 22.A train has 578 people in the front coaches and 363 people in the back coaches. How many people are on the train?
23. 23.526 + ? = 963
24. 24.627 − ? = 455
25. 25.127 + 835 =
26. 26.? − 199 = 44
27. 27.? + 602 = 943
28. 28.? + 616 = 768
29. 29.? − 156 = 538
30. 30.254 + ? = 799
31. 31.166 + 295 =
32. 32.528 − ? = 352
33. 33.? + 653 = 772
34. 34.586 − 307 =
35. 35.327 − 168 =
36. 36.203 + ? = 328
37. 37.740 + ? = 868
38. 38.711 − ? = 481
39. 39.561 − ? = 376
40. 40.284 − 129 =

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