Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 839 · 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. 1.315 − ? = 86
2. 2.? − 194 = 185
3. 3.364 + 220 =
4. 4.218 + 331 =
5. 5.A school has 821 children. 636 of them are girls. How many boys are there?
6. 6.362 + 580 =
7. 7.799 − 266 =
8. 8.107 + 797 =
9. 9.A train has 665 people in the front coaches and 124 people in the back coaches. How many people are on the train?
10. 10.? − 708 = 150
11. 11.? + 541 = 774
12. 12.A school has 779 children. 313 of them are girls. How many boys are there?
13. 13.241 − ? = 95
14. 14.562 − ? = 350
15. 15.A school has 309 children. 120 of them are girls. How many boys are there?
16. 16.608 + 260 =
17. 17.548 − ? = 38
18. 18.671 + 179 =
19. 19.729 + ? = 887
20. 20.715 − ? = 277
21. 21.? − 110 = 211
22. 22.751 + 175 =
23. 23.425 − 297 =
24. 24.650 + 256 =
25. 25.816 − 265 =
26. 26.639 − 207 =
27. 27.A train has 776 people in the front coaches and 104 people in the back coaches. How many people are on the train?
28. 28.605 − 482 =
29. 29.702 − 362 =
30. 30.552 + 202 =
31. 31.? − 108 = 170
32. 32.579 + ? = 993
33. 33.812 + ? = 948
34. 34.789 − ? = 101
35. 35.A school has 341 children. 190 of them are girls. How many boys are there?
36. 36.607 − ? = 159
37. 37.579 + 327 =
38. 38.636 − 198 =
39. 39.455 − 310 =
40. 40.641 + 313 =

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