Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 463 · 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. 1.397 − ? = 284
2. 2.296 − ? = 129
3. 3.320 + 160 =
4. 4.593 + ? = 713
5. 5.? − 337 = 65
6. 6.841 + 127 =
7. 7.845 + ? = 974
8. 8.A train has 354 people in the front coaches and 294 people in the back coaches. How many people are on the train?
9. 9.A school has 200 children. 135 of them are girls. How many boys are there?
10. 10.A train has 198 people in the front coaches and 179 people in the back coaches. How many people are on the train?
11. 11.885 − 773 =
12. 12.? − 276 = 104
13. 13.? − 115 = 566
14. 14.155 + 241 =
15. 15.A train has 346 people in the front coaches and 569 people in the back coaches. How many people are on the train?
16. 16.A train has 135 people in the front coaches and 500 people in the back coaches. How many people are on the train?
17. 17.A school has 222 children. 173 of them are girls. How many boys are there?
18. 18.946 − 605 =
19. 19.A train has 179 people in the front coaches and 152 people in the back coaches. How many people are on the train?
20. 20.A train has 539 people in the front coaches and 418 people in the back coaches. How many people are on the train?
21. 21.A train has 277 people in the front coaches and 341 people in the back coaches. How many people are on the train?
22. 22.347 + 558 =
23. 23.926 − 414 =
24. 24.A train has 323 people in the front coaches and 406 people in the back coaches. How many people are on the train?
25. 25.591 + 208 =
26. 26.A train has 284 people in the front coaches and 655 people in the back coaches. How many people are on the train?
27. 27.A train has 121 people in the front coaches and 310 people in the back coaches. How many people are on the train?
28. 28.240 + 594 =
29. 29.194 + ? = 923
30. 30.339 + ? = 949
31. 31.830 − ? = 84
32. 32.791 − 707 =
33. 33.349 − 338 =
34. 34.405 − ? = 92
35. 35.516 − ? = 59
36. 36.255 + 273 =
37. 37.? − 109 = 185
38. 38.A train has 738 people in the front coaches and 222 people in the back coaches. How many people are on the train?
39. 39.578 + ? = 729
40. 40.637 + 104 =

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