Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 280 · 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.A school has 871 children. 673 of them are girls. How many boys are there?
2. 2.667 + 265 =
3. 3.? − 411 = 457
4. 4.485 − 475 =
5. 5.522 + ? = 839
6. 6.741 − 437 =
7. 7.? + 242 = 943
8. 8.419 + 107 =
9. 9.A train has 209 people in the front coaches and 125 people in the back coaches. How many people are on the train?
10. 10.862 + 117 =
11. 11.775 + 195 =
12. 12.A train has 209 people in the front coaches and 626 people in the back coaches. How many people are on the train?
13. 13.351 − 296 =
14. 14.? − 156 = 147
15. 15.169 + 440 =
16. 16.A train has 259 people in the front coaches and 439 people in the back coaches. How many people are on the train?
17. 17.A school has 812 children. 502 of them are girls. How many boys are there?
18. 18.? + 394 = 758
19. 19.284 + ? = 877
20. 20.190 + 351 =
21. 21.916 − 120 =
22. 22.A school has 452 children. 415 of them are girls. How many boys are there?
23. 23.368 − 147 =
24. 24.544 − 447 =
25. 25.A school has 780 children. 129 of them are girls. How many boys are there?
26. 26.703 + 144 =
27. 27.A school has 465 children. 161 of them are girls. How many boys are there?
28. 28.387 + 127 =
29. 29.A train has 308 people in the front coaches and 217 people in the back coaches. How many people are on the train?
30. 30.? − 261 = 56
31. 31.221 + ? = 738
32. 32.? + 285 = 997
33. 33.461 + 436 =
34. 34.365 − 168 =
35. 35.621 + 285 =
36. 36.252 − 171 =
37. 37.? + 158 = 682
38. 38.854 + 103 =
39. 39.A school has 953 children. 511 of them are girls. How many boys are there?
40. 40.703 − ? = 316

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