Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 207 · 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. 1.702 + 150 =
2. 2.A school has 921 children. 760 of them are girls. How many boys are there?
3. 3.769 + 222 =
4. 4.? − 355 = 230
5. 5.908 − ? = 128
6. 6.302 + 434 =
7. 7.622 − 207 =
8. 8.676 − 251 =
9. 9.670 + ? = 791
10. 10.105 + ? = 872
11. 11.214 − 111 =
12. 12.A school has 275 children. 214 of them are girls. How many boys are there?
13. 13.893 − 361 =
14. 14.607 − 242 =
15. 15.201 + 357 =
16. 16.A train has 258 people in the front coaches and 377 people in the back coaches. How many people are on the train?
17. 17.A train has 115 people in the front coaches and 464 people in the back coaches. How many people are on the train?
18. 18.785 + 116 =
19. 19.442 + 104 =
20. 20.749 + 106 =
21. 21.? − 538 = 45
22. 22.789 + 101 =
23. 23.111 + ? = 594
24. 24.480 − 468 =
25. 25.882 − 616 =
26. 26.493 − ? = 283
27. 27.170 + 807 =
28. 28.? − 172 = 409
29. 29.A train has 688 people in the front coaches and 143 people in the back coaches. How many people are on the train?
30. 30.826 + 152 =
31. 31.210 + 179 =
32. 32.A school has 486 children. 474 of them are girls. How many boys are there?
33. 33.227 − ? = 68
34. 34.A train has 132 people in the front coaches and 316 people in the back coaches. How many people are on the train?
35. 35.A school has 247 children. 164 of them are girls. How many boys are there?
36. 36.? + 384 = 767
37. 37.102 + ? = 392
38. 38.555 + ? = 974
39. 39.361 − 168 =
40. 40.892 − ? = 711

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