Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 159 · 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 525 people in the front coaches and 264 people in the back coaches. How many people are on the train?
2. 2.329 − 137 =
3. 3.A train has 333 people in the front coaches and 285 people in the back coaches. How many people are on the train?
4. 4.? + 217 = 853
5. 5.455 − ? = 211
6. 6.? − 542 = 261
7. 7.A train has 218 people in the front coaches and 272 people in the back coaches. How many people are on the train?
8. 8.A train has 369 people in the front coaches and 282 people in the back coaches. How many people are on the train?
9. 9.A train has 614 people in the front coaches and 102 people in the back coaches. How many people are on the train?
10. 10.A train has 151 people in the front coaches and 201 people in the back coaches. How many people are on the train?
11. 11.358 − ? = 65
12. 12.493 − 372 =
13. 13.653 − 350 =
14. 14.A train has 748 people in the front coaches and 192 people in the back coaches. How many people are on the train?
15. 15.A train has 315 people in the front coaches and 149 people in the back coaches. How many people are on the train?
16. 16.590 − 425 =
17. 17.768 − ? = 554
18. 18.394 + 357 =
19. 19.810 − ? = 328
20. 20.475 + ? = 696
21. 21.727 − 223 =
22. 22.A school has 250 children. 153 of them are girls. How many boys are there?
23. 23.643 + 167 =
24. 24.528 + ? = 871
25. 25.127 + 536 =
26. 26.664 + 158 =
27. 27.A train has 802 people in the front coaches and 160 people in the back coaches. How many people are on the train?
28. 28.A school has 716 children. 395 of them are girls. How many boys are there?
29. 29.859 − 635 =
30. 30.305 − 106 =
31. 31.399 − 149 =
32. 32.A school has 358 children. 199 of them are girls. How many boys are there?
33. 33.? − 169 = 314
34. 34.303 + 318 =
35. 35.A train has 862 people in the front coaches and 100 people in the back coaches. How many people are on the train?
36. 36.215 − 191 =
37. 37.? + 178 = 721
38. 38.261 + 519 =
39. 39.144 + 508 =
40. 40.591 − 396 =

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