Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 743 · 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.A train has 325 people in the front coaches and 337 people in the back coaches. How many people are on the train?
2. 2.290 − ? = 155
3. 3.277 − 114 =
4. 4.642 − 456 =
5. 5.792 − 394 =
6. 6.A train has 682 people in the front coaches and 158 people in the back coaches. How many people are on the train?
7. 7.? + 326 = 660
8. 8.694 + ? = 865
9. 9.A train has 206 people in the front coaches and 271 people in the back coaches. How many people are on the train?
10. 10.738 + 226 =
11. 11.A school has 290 children. 265 of them are girls. How many boys are there?
12. 12.859 + ? = 979
13. 13.486 − ? = 39
14. 14.553 − 175 =
15. 15.A train has 656 people in the front coaches and 262 people in the back coaches. How many people are on the train?
16. 16.A train has 705 people in the front coaches and 128 people in the back coaches. How many people are on the train?
17. 17.A school has 817 children. 331 of them are girls. How many boys are there?
18. 18.509 − 503 =
19. 19.A train has 292 people in the front coaches and 605 people in the back coaches. How many people are on the train?
20. 20.A train has 295 people in the front coaches and 457 people in the back coaches. How many people are on the train?
21. 21.578 + 341 =
22. 22.A train has 599 people in the front coaches and 159 people in the back coaches. How many people are on the train?
23. 23.211 + 364 =
24. 24.A school has 398 children. 389 of them are girls. How many boys are there?
25. 25.723 + 100 =
26. 26.935 − 628 =
27. 27.A train has 328 people in the front coaches and 474 people in the back coaches. How many people are on the train?
28. 28.A train has 762 people in the front coaches and 127 people in the back coaches. How many people are on the train?
29. 29.A school has 920 children. 629 of them are girls. How many boys are there?
30. 30.862 + 132 =
31. 31.800 − 788 =
32. 32.A train has 682 people in the front coaches and 230 people in the back coaches. How many people are on the train?
33. 33.A school has 586 children. 243 of them are girls. How many boys are there?
34. 34.643 − 320 =
35. 35.797 − 411 =
36. 36.381 + 185 =
37. 37.434 + 156 =
38. 38.810 − 348 =
39. 39.264 + ? = 429
40. 40.879 − 800 =

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