Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 953 · 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. 1.462 + 395 =
2. 2.A train has 339 people in the front coaches and 546 people in the back coaches. How many people are on the train?
3. 3.? + 342 = 762
4. 4.A train has 857 people in the front coaches and 126 people in the back coaches. How many people are on the train?
5. 5.515 − 184 =
6. 6.? + 199 = 304
7. 7.936 − 342 =
8. 8.? + 471 = 663
9. 9.A train has 481 people in the front coaches and 406 people in the back coaches. How many people are on the train?
10. 10.319 + ? = 445
11. 11.A school has 969 children. 188 of them are girls. How many boys are there?
12. 12.559 − 280 =
13. 13.268 + 717 =
14. 14.632 − 146 =
15. 15.269 + 460 =
16. 16.? + 826 = 942
17. 17.? − 242 = 588
18. 18.846 − 830 =
19. 19.A school has 522 children. 419 of them are girls. How many boys are there?
20. 20.A school has 313 children. 169 of them are girls. How many boys are there?
21. 21.? − 599 = 247
22. 22.760 − 732 =
23. 23.136 + ? = 276
24. 24.529 − ? = 182
25. 25.862 + 116 =
26. 26.A train has 368 people in the front coaches and 257 people in the back coaches. How many people are on the train?
27. 27.A school has 322 children. 105 of them are girls. How many boys are there?
28. 28.417 + ? = 872
29. 29.100 + 883 =
30. 30.A school has 561 children. 203 of them are girls. How many boys are there?
31. 31.394 + 546 =
32. 32.682 + 185 =
33. 33.? − 322 = 377
34. 34.? + 162 = 777
35. 35.128 + 634 =
36. 36.241 + 116 =
37. 37.430 + 496 =
38. 38.603 − ? = 135
39. 39.535 + 181 =
40. 40.539 + 209 =

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