Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 394 · 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. 1.830 − 153 =
2. 2.323 − ? = 141
3. 3.669 + 160 =
4. 4.A school has 984 children. 865 of them are girls. How many boys are there?
5. 5.413 + 203 =
6. 6.690 + 209 =
7. 7.752 + 111 =
8. 8.343 − 139 =
9. 9.287 + 111 =
10. 10.A school has 736 children. 135 of them are girls. How many boys are there?
11. 11.206 − ? = 88
12. 12.322 + 474 =
13. 13.681 + 197 =
14. 14.136 + ? = 301
15. 15.604 + 242 =
16. 16.650 − ? = 247
17. 17.408 + 114 =
18. 18.? − 188 = 725
19. 19.864 − ? = 244
20. 20.380 − 222 =
21. 21.427 − ? = 270
22. 22.? + 468 = 709
23. 23.? + 684 = 986
24. 24.350 − ? = 70
25. 25.840 − ? = 405
26. 26.937 − ? = 759
27. 27.218 + 508 =
28. 28.474 − 116 =
29. 29.302 − 207 =
30. 30.800 − 269 =
31. 31.A train has 805 people in the front coaches and 152 people in the back coaches. How many people are on the train?
32. 32.805 − 116 =
33. 33.A train has 568 people in the front coaches and 164 people in the back coaches. How many people are on the train?
34. 34.? − 134 = 668
35. 35.A school has 299 children. 237 of them are girls. How many boys are there?
36. 36.429 + 283 =
37. 37.? + 492 = 610
38. 38.A school has 573 children. 112 of them are girls. How many boys are there?
39. 39.A train has 499 people in the front coaches and 266 people in the back coaches. How many people are on the train?
40. 40.406 + 249 =

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