Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 432 · 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 542 people in the front coaches and 292 people in the back coaches. How many people are on the train?
2. 2.A school has 834 children. 282 of them are girls. How many boys are there?
3. 3.295 − 203 =
4. 4.537 − 111 =
5. 5.670 + 169 =
6. 6.700 − ? = 58
7. 7.A school has 224 children. 131 of them are girls. How many boys are there?
8. 8.710 + 237 =
9. 9.244 + ? = 388
10. 10.257 − 146 =
11. 11.341 − ? = 211
12. 12.331 + 247 =
13. 13.437 − 329 =
14. 14.A train has 817 people in the front coaches and 165 people in the back coaches. How many people are on the train?
15. 15.? − 118 = 187
16. 16.? + 776 = 903
17. 17.261 + 594 =
18. 18.? − 375 = 36
19. 19.604 − ? = 242
20. 20.291 + 513 =
21. 21.429 + 385 =
22. 22.187 + 649 =
23. 23.A school has 382 children. 381 of them are girls. How many boys are there?
24. 24.594 + ? = 931
25. 25.769 + 218 =
26. 26.404 − 120 =
27. 27.176 + 202 =
28. 28.A train has 115 people in the front coaches and 363 people in the back coaches. How many people are on the train?
29. 29.646 + 288 =
30. 30.A school has 305 children. 130 of them are girls. How many boys are there?
31. 31.558 − 417 =
32. 32.A school has 640 children. 268 of them are girls. How many boys are there?
33. 33.640 − 636 =
34. 34.773 − 524 =
35. 35.870 − 313 =
36. 36.? − 234 = 308
37. 37.? − 296 = 51
38. 38.? − 858 = 39
39. 39.675 + ? = 841
40. 40.753 + 243 =

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