Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 691 · 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. 1.680 + 141 =
2. 2.164 + 460 =
3. 3.A school has 371 children. 169 of them are girls. How many boys are there?
4. 4.A school has 766 children. 495 of them are girls. How many boys are there?
5. 5.? + 784 = 890
6. 6.A train has 521 people in the front coaches and 144 people in the back coaches. How many people are on the train?
7. 7.? + 205 = 462
8. 8.842 − 295 =
9. 9.A school has 495 children. 464 of them are girls. How many boys are there?
10. 10.A train has 449 people in the front coaches and 360 people in the back coaches. How many people are on the train?
11. 11.A school has 301 children. 243 of them are girls. How many boys are there?
12. 12.565 − ? = 408
13. 13.579 + ? = 930
14. 14.? − 283 = 51
15. 15.242 + 728 =
16. 16.A train has 790 people in the front coaches and 172 people in the back coaches. How many people are on the train?
17. 17.A train has 281 people in the front coaches and 444 people in the back coaches. How many people are on the train?
18. 18.A school has 208 children. 106 of them are girls. How many boys are there?
19. 19.844 − ? = 41
20. 20.A train has 891 people in the front coaches and 100 people in the back coaches. How many people are on the train?
21. 21.940 − 242 =
22. 22.? + 123 = 941
23. 23.691 + 144 =
24. 24.A train has 215 people in the front coaches and 322 people in the back coaches. How many people are on the train?
25. 25.A train has 524 people in the front coaches and 294 people in the back coaches. How many people are on the train?
26. 26.536 + 224 =
27. 27.884 − ? = 77
28. 28.272 + 288 =
29. 29.930 − 509 =
30. 30.A school has 827 children. 251 of them are girls. How many boys are there?
31. 31.468 + ? = 671
32. 32.A school has 298 children. 196 of them are girls. How many boys are there?
33. 33.165 + ? = 290
34. 34.265 − 163 =
35. 35.A train has 221 people in the front coaches and 209 people in the back coaches. How many people are on the train?
36. 36.586 + 266 =
37. 37.A train has 180 people in the front coaches and 817 people in the back coaches. How many people are on the train?
38. 38.? + 298 = 708
39. 39.752 + 168 =
40. 40.A train has 852 people in the front coaches and 101 people in the back coaches. How many people are on the train?

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