Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 42 · 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. 1.181 + 780 =
2. 2.A school has 431 children. 218 of them are girls. How many boys are there?
3. 3.686 − 340 =
4. 4.? − 369 = 206
5. 5.321 + 358 =
6. 6.525 + 326 =
7. 7.? + 777 = 955
8. 8.? + 639 = 892
9. 9.A train has 817 people in the front coaches and 125 people in the back coaches. How many people are on the train?
10. 10.273 + ? = 507
11. 11.292 + 189 =
12. 12.308 + 162 =
13. 13.415 + ? = 889
14. 14.267 − ? = 52
15. 15.322 + ? = 548
16. 16.? − 309 = 36
17. 17.965 − 331 =
18. 18.262 − 108 =
19. 19.412 + 202 =
20. 20.215 + ? = 593
21. 21.? − 202 = 465
22. 22.? + 324 = 647
23. 23.A train has 451 people in the front coaches and 408 people in the back coaches. How many people are on the train?
24. 24.A school has 899 children. 683 of them are girls. How many boys are there?
25. 25.A school has 825 children. 292 of them are girls. How many boys are there?
26. 26.662 + 293 =
27. 27.? + 503 = 820
28. 28.683 + 132 =
29. 29.723 − ? = 106
30. 30.717 − 242 =
31. 31.892 + ? = 992
32. 32.951 − ? = 89
33. 33.324 + 139 =
34. 34.543 − 157 =
35. 35.272 + 401 =
36. 36.A train has 496 people in the front coaches and 432 people in the back coaches. How many people are on the train?
37. 37.231 − 225 =
38. 38.? + 537 = 765
39. 39.912 − 850 =
40. 40.A train has 714 people in the front coaches and 103 people in the back coaches. How many people are on the train?

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