Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 737 · 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.? + 179 = 362
2. 2.130 + 355 =
3. 3.? − 615 = 274
4. 4.496 − 420 =
5. 5.? + 547 = 967
6. 6.A school has 457 children. 315 of them are girls. How many boys are there?
7. 7.397 − ? = 251
8. 8.632 + 195 =
9. 9.284 − ? = 160
10. 10.383 − ? = 219
11. 11.929 − ? = 471
12. 12.783 + 205 =
13. 13.195 + ? = 975
14. 14.A train has 266 people in the front coaches and 442 people in the back coaches. How many people are on the train?
15. 15.A school has 407 children. 156 of them are girls. How many boys are there?
16. 16.219 − 209 =
17. 17.186 + 108 =
18. 18.? − 160 = 481
19. 19.212 − 193 =
20. 20.359 + 252 =
21. 21.? + 893 = 996
22. 22.A school has 295 children. 205 of them are girls. How many boys are there?
23. 23.A school has 271 children. 115 of them are girls. How many boys are there?
24. 24.908 − 237 =
25. 25.541 − 158 =
26. 26.348 − 241 =
27. 27.242 + 738 =
28. 28.609 + 230 =
29. 29.751 + 109 =
30. 30.A school has 315 children. 128 of them are girls. How many boys are there?
31. 31.233 + 721 =
32. 32.225 − 218 =
33. 33.231 − ? = 119
34. 34.A school has 352 children. 165 of them are girls. How many boys are there?
35. 35.664 + 258 =
36. 36.823 + ? = 927
37. 37.285 − 258 =
38. 38.315 + 492 =
39. 39.790 − ? = 523
40. 40.A train has 627 people in the front coaches and 292 people in the back coaches. How many people are on the train?

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