Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 546 · 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. 1.313 + 505 =
2. 2.A school has 981 children. 605 of them are girls. How many boys are there?
3. 3.823 − 512 =
4. 4.643 + 279 =
5. 5.A school has 631 children. 557 of them are girls. How many boys are there?
6. 6.? − 123 = 311
7. 7.420 + 489 =
8. 8.393 + ? = 566
9. 9.556 + 121 =
10. 10.436 − 283 =
11. 11.462 − 205 =
12. 12.A school has 331 children. 159 of them are girls. How many boys are there?
13. 13.804 − 750 =
14. 14.A school has 804 children. 191 of them are girls. How many boys are there?
15. 15.281 + ? = 783
16. 16.? + 452 = 730
17. 17.283 − 136 =
18. 18.? + 671 = 883
19. 19.484 + 128 =
20. 20.325 + 163 =
21. 21.A train has 245 people in the front coaches and 222 people in the back coaches. How many people are on the train?
22. 22.A train has 284 people in the front coaches and 301 people in the back coaches. How many people are on the train?
23. 23.497 + 223 =
24. 24.277 − 113 =
25. 25.767 + 102 =
26. 26.A train has 846 people in the front coaches and 138 people in the back coaches. How many people are on the train?
27. 27.? − 775 = 82
28. 28.778 + 148 =
29. 29.? − 128 = 147
30. 30.362 + 312 =
31. 31.633 − 109 =
32. 32.? − 380 = 240
33. 33.A school has 380 children. 251 of them are girls. How many boys are there?
34. 34.? + 839 = 989
35. 35.723 − ? = 622
36. 36.572 − ? = 349
37. 37.? − 357 = 20
38. 38.687 − 513 =
39. 39.A school has 255 children. 217 of them are girls. How many boys are there?
40. 40.904 − 572 =

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