Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 69 · 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. 1.207 + ? = 849
2. 2.A train has 744 people in the front coaches and 227 people in the back coaches. How many people are on the train?
3. 3.499 + 318 =
4. 4.A school has 997 children. 476 of them are girls. How many boys are there?
5. 5.291 + 602 =
6. 6.118 + ? = 569
7. 7.286 − ? = 154
8. 8.347 − ? = 19
9. 9.924 − 235 =
10. 10.? − 295 = 375
11. 11.872 − 389 =
12. 12.860 + 111 =
13. 13.274 − 245 =
14. 14.A train has 499 people in the front coaches and 401 people in the back coaches. How many people are on the train?
15. 15.210 + 167 =
16. 16.254 − 125 =
17. 17.? − 617 = 369
18. 18.681 + ? = 971
19. 19.308 + 387 =
20. 20.? + 306 = 575
21. 21.546 − 391 =
22. 22.A school has 391 children. 261 of them are girls. How many boys are there?
23. 23.320 + ? = 690
24. 24.? + 774 = 992
25. 25.454 + ? = 800
26. 26.782 + 104 =
27. 27.825 + 139 =
28. 28.338 − ? = 144
29. 29.582 + 104 =
30. 30.877 − 546 =
31. 31.104 + 274 =
32. 32.A train has 664 people in the front coaches and 283 people in the back coaches. How many people are on the train?
33. 33.A train has 563 people in the front coaches and 228 people in the back coaches. How many people are on the train?
34. 34.842 + 119 =
35. 35.208 − 129 =
36. 36.394 + 289 =
37. 37.466 − 274 =
38. 38.A train has 582 people in the front coaches and 282 people in the back coaches. How many people are on the train?
39. 39.A train has 306 people in the front coaches and 673 people in the back coaches. How many people are on the train?
40. 40.184 + 764 =

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