Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 481 · 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. 1.568 − 271 =
2. 2.543 + 283 =
3. 3.718 − ? = 588
4. 4.A train has 522 people in the front coaches and 262 people in the back coaches. How many people are on the train?
5. 5.A school has 666 children. 275 of them are girls. How many boys are there?
6. 6.706 − ? = 264
7. 7.335 + 101 =
8. 8.692 − 210 =
9. 9.620 + 156 =
10. 10.A school has 454 children. 285 of them are girls. How many boys are there?
11. 11.379 − 278 =
12. 12.? + 547 = 784
13. 13.? − 141 = 105
14. 14.? − 266 = 464
15. 15.? + 331 = 646
16. 16.214 − ? = 95
17. 17.A school has 680 children. 499 of them are girls. How many boys are there?
18. 18.866 + 106 =
19. 19.368 + 295 =
20. 20.108 + 210 =
21. 21.357 − 308 =
22. 22.205 + ? = 727
23. 23.A school has 983 children. 436 of them are girls. How many boys are there?
24. 24.348 + 638 =
25. 25.850 + 112 =
26. 26.A school has 791 children. 433 of them are girls. How many boys are there?
27. 27.558 + 353 =
28. 28.583 − 206 =
29. 29.A train has 381 people in the front coaches and 559 people in the back coaches. How many people are on the train?
30. 30.A school has 957 children. 560 of them are girls. How many boys are there?
31. 31.A school has 323 children. 131 of them are girls. How many boys are there?
32. 32.223 − 138 =
33. 33.602 − 133 =
34. 34.281 − 131 =
35. 35.668 + 272 =
36. 36.544 − ? = 5
37. 37.398 + 200 =
38. 38.240 + ? = 783
39. 39.? + 364 = 613
40. 40.689 + 161 =

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