Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 471 · 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.? − 692 = 268
2. 2.A train has 805 people in the front coaches and 103 people in the back coaches. How many people are on the train?
3. 3.324 + 145 =
4. 4.A train has 818 people in the front coaches and 105 people in the back coaches. How many people are on the train?
5. 5.A school has 910 children. 399 of them are girls. How many boys are there?
6. 6.865 − 191 =
7. 7.836 + 153 =
8. 8.419 − ? = 246
9. 9.378 − 153 =
10. 10.A train has 732 people in the front coaches and 242 people in the back coaches. How many people are on the train?
11. 11.A train has 806 people in the front coaches and 185 people in the back coaches. How many people are on the train?
12. 12.A school has 597 children. 381 of them are girls. How many boys are there?
13. 13.A train has 246 people in the front coaches and 233 people in the back coaches. How many people are on the train?
14. 14.749 + 171 =
15. 15.322 + 224 =
16. 16.514 + 184 =
17. 17.804 + 151 =
18. 18.373 − 287 =
19. 19.? − 585 = 323
20. 20.? − 139 = 494
21. 21.729 − ? = 115
22. 22.? − 622 = 325
23. 23.A school has 306 children. 138 of them are girls. How many boys are there?
24. 24.? + 350 = 594
25. 25.A train has 884 people in the front coaches and 101 people in the back coaches. How many people are on the train?
26. 26.A train has 801 people in the front coaches and 122 people in the back coaches. How many people are on the train?
27. 27.559 − 113 =
28. 28.A school has 286 children. 111 of them are girls. How many boys are there?
29. 29.A train has 604 people in the front coaches and 351 people in the back coaches. How many people are on the train?
30. 30.473 + 338 =
31. 31.A train has 596 people in the front coaches and 338 people in the back coaches. How many people are on the train?
32. 32.791 − 524 =
33. 33.116 + 283 =
34. 34.811 − 154 =
35. 35.525 − ? = 294
36. 36.673 − 187 =
37. 37.A school has 584 children. 192 of them are girls. How many boys are there?
38. 38.? + 358 = 678
39. 39.A train has 387 people in the front coaches and 521 people in the back coaches. How many people are on the train?
40. 40.320 + ? = 673

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