Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 927 · 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 705 people in the front coaches and 174 people in the back coaches. How many people are on the train?
2. 2.242 − 148 =
3. 3.? − 282 = 55
4. 4.241 + ? = 440
5. 5.372 − 212 =
6. 6.439 − 382 =
7. 7.A school has 802 children. 160 of them are girls. How many boys are there?
8. 8.? − 296 = 64
9. 9.454 + 346 =
10. 10.836 + 102 =
11. 11.771 + 208 =
12. 12.842 − 598 =
13. 13.A school has 549 children. 234 of them are girls. How many boys are there?
14. 14.A train has 888 people in the front coaches and 100 people in the back coaches. How many people are on the train?
15. 15.108 + 451 =
16. 16.891 + 101 =
17. 17.829 − 263 =
18. 18.942 − ? = 74
19. 19.A school has 554 children. 271 of them are girls. How many boys are there?
20. 20.548 + ? = 769
21. 21.A school has 513 children. 204 of them are girls. How many boys are there?
22. 22.483 − ? = 281
23. 23.416 − ? = 131
24. 24.569 + ? = 796
25. 25.327 + 403 =
26. 26.753 − 572 =
27. 27.329 + 115 =
28. 28.802 − ? = 376
29. 29.292 + 605 =
30. 30.233 + 463 =
31. 31.508 − 416 =
32. 32.957 − 611 =
33. 33.556 + 341 =
34. 34.A train has 118 people in the front coaches and 375 people in the back coaches. How many people are on the train?
35. 35.438 − 426 =
36. 36.463 − 335 =
37. 37.467 − ? = 39
38. 38.296 + 686 =
39. 39.466 + 146 =
40. 40.329 − ? = 62

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