Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 197 · 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. 1.470 + 474 =
2. 2.A train has 236 people in the front coaches and 430 people in the back coaches. How many people are on the train?
3. 3.A train has 868 people in the front coaches and 123 people in the back coaches. How many people are on the train?
4. 4.596 + ? = 871
5. 5.A train has 142 people in the front coaches and 832 people in the back coaches. How many people are on the train?
6. 6.? + 529 = 726
7. 7.A train has 890 people in the front coaches and 108 people in the back coaches. How many people are on the train?
8. 8.306 + ? = 872
9. 9.? + 108 = 539
10. 10.A train has 495 people in the front coaches and 431 people in the back coaches. How many people are on the train?
11. 11.A school has 775 children. 101 of them are girls. How many boys are there?
12. 12.A school has 908 children. 105 of them are girls. How many boys are there?
13. 13.180 + 753 =
14. 14.584 − 439 =
15. 15.384 − ? = 170
16. 16.A train has 567 people in the front coaches and 371 people in the back coaches. How many people are on the train?
17. 17.? + 468 = 766
18. 18.127 + 517 =
19. 19.517 − 101 =
20. 20.A train has 385 people in the front coaches and 321 people in the back coaches. How many people are on the train?
21. 21.656 − 171 =
22. 22.? + 123 = 868
23. 23.A school has 914 children. 386 of them are girls. How many boys are there?
24. 24.871 − ? = 534
25. 25.A train has 133 people in the front coaches and 833 people in the back coaches. How many people are on the train?
26. 26.192 + 479 =
27. 27.A school has 341 children. 279 of them are girls. How many boys are there?
28. 28.A train has 375 people in the front coaches and 582 people in the back coaches. How many people are on the train?
29. 29.549 + 313 =
30. 30.A school has 667 children. 591 of them are girls. How many boys are there?
31. 31.A school has 819 children. 133 of them are girls. How many boys are there?
32. 32.582 + ? = 957
33. 33.623 − ? = 506
34. 34.302 + 372 =
35. 35.? − 299 = 422
36. 36.220 − 122 =
37. 37.611 − 189 =
38. 38.A train has 241 people in the front coaches and 324 people in the back coaches. How many people are on the train?
39. 39.454 − 362 =
40. 40.270 − 149 =

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