Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 486 · 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. 1.847 − ? = 258
2. 2.428 − 182 =
3. 3.A school has 408 children. 198 of them are girls. How many boys are there?
4. 4.632 − 368 =
5. 5.773 + ? = 929
6. 6.819 − 390 =
7. 7.261 + ? = 431
8. 8.682 − ? = 417
9. 9.608 + 315 =
10. 10.A school has 573 children. 234 of them are girls. How many boys are there?
11. 11.799 + 112 =
12. 12.? − 441 = 108
13. 13.A school has 207 children. 189 of them are girls. How many boys are there?
14. 14.234 + 303 =
15. 15.173 + 577 =
16. 16.571 − ? = 369
17. 17.? − 898 = 12
18. 18.387 + ? = 852
19. 19.367 + ? = 968
20. 20.755 + ? = 891
21. 21.A school has 898 children. 465 of them are girls. How many boys are there?
22. 22.A train has 743 people in the front coaches and 111 people in the back coaches. How many people are on the train?
23. 23.230 − ? = 22
24. 24.388 + ? = 684
25. 25.A train has 176 people in the front coaches and 575 people in the back coaches. How many people are on the train?
26. 26.713 − 368 =
27. 27.? − 432 = 177
28. 28.839 + 129 =
29. 29.616 + 111 =
30. 30.948 − 468 =
31. 31.A train has 518 people in the front coaches and 390 people in the back coaches. How many people are on the train?
32. 32.A school has 361 children. 240 of them are girls. How many boys are there?
33. 33.647 + 178 =
34. 34.306 + ? = 428
35. 35.A train has 799 people in the front coaches and 173 people in the back coaches. How many people are on the train?
36. 36.852 − 790 =
37. 37.A school has 559 children. 371 of them are girls. How many boys are there?
38. 38.? + 257 = 961
39. 39.? − 141 = 106
40. 40.371 − ? = 99

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