Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 831 · 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. 1.697 − ? = 496
2. 2.347 − 292 =
3. 3.? − 409 = 455
4. 4.? − 183 = 372
5. 5.? − 527 = 71
6. 6.452 + 156 =
7. 7.277 − ? = 159
8. 8.389 − 119 =
9. 9.A train has 157 people in the front coaches and 807 people in the back coaches. How many people are on the train?
10. 10.A train has 427 people in the front coaches and 344 people in the back coaches. How many people are on the train?
11. 11.131 + 659 =
12. 12.518 − ? = 111
13. 13.352 + 627 =
14. 14.701 − 517 =
15. 15.A train has 394 people in the front coaches and 212 people in the back coaches. How many people are on the train?
16. 16.A train has 156 people in the front coaches and 259 people in the back coaches. How many people are on the train?
17. 17.214 − 171 =
18. 18.A school has 427 children. 264 of them are girls. How many boys are there?
19. 19.509 + 186 =
20. 20.A school has 296 children. 152 of them are girls. How many boys are there?
21. 21.257 − 150 =
22. 22.381 − 282 =
23. 23.379 + 134 =
24. 24.329 − 269 =
25. 25.994 − ? = 830
26. 26.678 − 119 =
27. 27.874 + 121 =
28. 28.898 + 101 =
29. 29.656 − ? = 402
30. 30.769 − 111 =
31. 31.845 + 131 =
32. 32.A school has 623 children. 444 of them are girls. How many boys are there?
33. 33.134 + ? = 447
34. 34.153 + ? = 753
35. 35.182 + 329 =
36. 36.741 − 273 =
37. 37.684 − 669 =
38. 38.? − 350 = 22
39. 39.A school has 208 children. 205 of them are girls. How many boys are there?
40. 40.A train has 241 people in the front coaches and 258 people in the back coaches. How many people are on the train?

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