Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 494 · 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.A school has 701 children. 147 of them are girls. How many boys are there?
2. 2.A train has 172 people in the front coaches and 751 people in the back coaches. How many people are on the train?
3. 3.128 + 737 =
4. 4.? − 131 = 456
5. 5.769 + 119 =
6. 6.368 − 152 =
7. 7.736 − 145 =
8. 8.576 + ? = 843
9. 9.A school has 944 children. 182 of them are girls. How many boys are there?
10. 10.A train has 870 people in the front coaches and 127 people in the back coaches. How many people are on the train?
11. 11.331 − 307 =
12. 12.687 + ? = 824
13. 13.289 − ? = 145
14. 14.706 − 118 =
15. 15.A train has 233 people in the front coaches and 635 people in the back coaches. How many people are on the train?
16. 16.A school has 515 children. 341 of them are girls. How many boys are there?
17. 17.355 + 468 =
18. 18.A train has 295 people in the front coaches and 343 people in the back coaches. How many people are on the train?
19. 19.137 + 713 =
20. 20.A school has 336 children. 158 of them are girls. How many boys are there?
21. 21.387 − ? = 81
22. 22.580 + 241 =
23. 23.382 + 123 =
24. 24.A school has 984 children. 947 of them are girls. How many boys are there?
25. 25.A train has 504 people in the front coaches and 477 people in the back coaches. How many people are on the train?
26. 26.? − 535 = 118
27. 27.632 + ? = 908
28. 28.A train has 303 people in the front coaches and 610 people in the back coaches. How many people are on the train?
29. 29.844 + 135 =
30. 30.A school has 371 children. 292 of them are girls. How many boys are there?
31. 31.A school has 733 children. 143 of them are girls. How many boys are there?
32. 32.A train has 876 people in the front coaches and 113 people in the back coaches. How many people are on the train?
33. 33.927 − 555 =
34. 34.A school has 459 children. 246 of them are girls. How many boys are there?
35. 35.A school has 400 children. 173 of them are girls. How many boys are there?
36. 36.714 − 143 =
37. 37.A train has 393 people in the front coaches and 244 people in the back coaches. How many people are on the train?
38. 38.767 − 107 =
39. 39.867 − 551 =
40. 40.310 + 254 =

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