Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 868 · 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. 1.866 − 304 =
2. 2.290 − ? = 186
3. 3.299 + 229 =
4. 4.754 + 146 =
5. 5.? − 151 = 136
6. 6.699 − 664 =
7. 7.464 + ? = 845
8. 8.? + 742 = 926
9. 9.A train has 198 people in the front coaches and 305 people in the back coaches. How many people are on the train?
10. 10.132 + ? = 291
11. 11.325 + 567 =
12. 12.? − 603 = 219
13. 13.? − 303 = 473
14. 14.427 − ? = 59
15. 15.? − 210 = 424
16. 16.? + 896 = 997
17. 17.A train has 892 people in the front coaches and 103 people in the back coaches. How many people are on the train?
18. 18.? − 384 = 380
19. 19.179 + 506 =
20. 20.732 + 210 =
21. 21.A school has 736 children. 184 of them are girls. How many boys are there?
22. 22.A train has 589 people in the front coaches and 112 people in the back coaches. How many people are on the train?
23. 23.691 + 215 =
24. 24.137 + ? = 359
25. 25.170 + ? = 324
26. 26.? − 332 = 431
27. 27.A school has 286 children. 231 of them are girls. How many boys are there?
28. 28.558 − 401 =
29. 29.376 − ? = 217
30. 30.780 − 249 =
31. 31.355 − ? = 210
32. 32.255 − 180 =
33. 33.A train has 828 people in the front coaches and 119 people in the back coaches. How many people are on the train?
34. 34.894 − 429 =
35. 35.? − 941 = 19
36. 36.633 + 342 =
37. 37.275 + 713 =
38. 38.A train has 608 people in the front coaches and 146 people in the back coaches. How many people are on the train?
39. 39.772 + ? = 886
40. 40.761 + 197 =

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