Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 133 · 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 train has 365 people in the front coaches and 590 people in the back coaches. How many people are on the train?
2. 2.390 − 355 =
3. 3.? − 237 = 111
4. 4.? − 193 = 665
5. 5.433 − ? = 4
6. 6.462 + 520 =
7. 7.A train has 538 people in the front coaches and 285 people in the back coaches. How many people are on the train?
8. 8.370 − ? = 222
9. 9.A school has 975 children. 150 of them are girls. How many boys are there?
10. 10.378 − 116 =
11. 11.843 − 378 =
12. 12.310 + 225 =
13. 13.A train has 280 people in the front coaches and 459 people in the back coaches. How many people are on the train?
14. 14.258 − ? = 3
15. 15.A train has 138 people in the front coaches and 198 people in the back coaches. How many people are on the train?
16. 16.? + 134 = 543
17. 17.504 + 230 =
18. 18.258 + 598 =
19. 19.539 − 343 =
20. 20.369 − 310 =
21. 21.609 + ? = 890
22. 22.762 + 225 =
23. 23.A school has 939 children. 826 of them are girls. How many boys are there?
24. 24.? − 112 = 237
25. 25.? − 188 = 93
26. 26.A school has 340 children. 320 of them are girls. How many boys are there?
27. 27.A school has 557 children. 280 of them are girls. How many boys are there?
28. 28.649 − ? = 529
29. 29.471 − 345 =
30. 30.939 − 248 =
31. 31.A school has 987 children. 721 of them are girls. How many boys are there?
32. 32.327 + 181 =
33. 33.551 − 288 =
34. 34.106 + 127 =
35. 35.321 + 435 =
36. 36.315 − 108 =
37. 37.526 + 216 =
38. 38.? − 293 = 561
39. 39.184 + 754 =
40. 40.764 + ? = 973

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