Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 590 · 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 508 people in the front coaches and 487 people in the back coaches. How many people are on the train?
2. 2.654 − 311 =
3. 3.A train has 150 people in the front coaches and 355 people in the back coaches. How many people are on the train?
4. 4.466 − ? = 169
5. 5.425 + 342 =
6. 6.923 − 910 =
7. 7.A school has 245 children. 220 of them are girls. How many boys are there?
8. 8.283 − 129 =
9. 9.732 − 265 =
10. 10.A school has 933 children. 854 of them are girls. How many boys are there?
11. 11.672 + ? = 901
12. 12.247 − 189 =
13. 13.A train has 590 people in the front coaches and 391 people in the back coaches. How many people are on the train?
14. 14.A train has 277 people in the front coaches and 297 people in the back coaches. How many people are on the train?
15. 15.A school has 231 children. 153 of them are girls. How many boys are there?
16. 16.405 + ? = 809
17. 17.A school has 786 children. 102 of them are girls. How many boys are there?
18. 18.A train has 718 people in the front coaches and 102 people in the back coaches. How many people are on the train?
19. 19.294 + 614 =
20. 20.182 + 440 =
21. 21.A train has 241 people in the front coaches and 292 people in the back coaches. How many people are on the train?
22. 22.813 − 586 =
23. 23.325 − ? = 63
24. 24.739 − 259 =
25. 25.A train has 388 people in the front coaches and 256 people in the back coaches. How many people are on the train?
26. 26.A train has 792 people in the front coaches and 145 people in the back coaches. How many people are on the train?
27. 27.325 + 252 =
28. 28.A school has 426 children. 247 of them are girls. How many boys are there?
29. 29.369 + 145 =
30. 30.342 + 565 =
31. 31.? + 387 = 859
32. 32.A school has 729 children. 264 of them are girls. How many boys are there?
33. 33.A school has 948 children. 672 of them are girls. How many boys are there?
34. 34.853 + 117 =
35. 35.775 + ? = 933
36. 36.224 + 214 =
37. 37.A train has 635 people in the front coaches and 329 people in the back coaches. How many people are on the train?
38. 38.368 + 550 =
39. 39.? + 746 = 952
40. 40.297 − ? = 13

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