Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 959 · 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 school has 749 children. 486 of them are girls. How many boys are there?
2. 2.416 − 355 =
3. 3.197 + 206 =
4. 4.145 + 690 =
5. 5.406 − 119 =
6. 6.881 − ? = 711
7. 7.244 + 352 =
8. 8.394 + 322 =
9. 9.219 + 573 =
10. 10.? − 101 = 441
11. 11.707 − 194 =
12. 12.816 + 112 =
13. 13.721 + 219 =
14. 14.800 − 637 =
15. 15.567 + 261 =
16. 16.538 − ? = 138
17. 17.776 − 105 =
18. 18.610 − 492 =
19. 19.664 + 204 =
20. 20.? + 112 = 721
21. 21.A train has 275 people in the front coaches and 130 people in the back coaches. How many people are on the train?
22. 22.? − 284 = 10
23. 23.617 + 280 =
24. 24.635 − ? = 189
25. 25.A train has 672 people in the front coaches and 236 people in the back coaches. How many people are on the train?
26. 26.? − 456 = 375
27. 27.A school has 381 children. 225 of them are girls. How many boys are there?
28. 28.339 − 304 =
29. 29.? + 424 = 595
30. 30.351 − 104 =
31. 31.308 + 610 =
32. 32.214 + 365 =
33. 33.? + 402 = 962
34. 34.924 − ? = 772
35. 35.375 + 321 =
36. 36.305 − 266 =
37. 37.? + 319 = 484
38. 38.? − 195 = 290
39. 39.724 + 272 =
40. 40.A school has 666 children. 640 of them are girls. How many boys are there?

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