Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 661 · 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. 1.765 − 432 =
2. 2.A school has 940 children. 311 of them are girls. How many boys are there?
3. 3.A train has 354 people in the front coaches and 298 people in the back coaches. How many people are on the train?
4. 4.A school has 467 children. 270 of them are girls. How many boys are there?
5. 5.661 + 201 =
6. 6.584 − ? = 218
7. 7.582 + 113 =
8. 8.? + 409 = 688
9. 9.A school has 290 children. 223 of them are girls. How many boys are there?
10. 10.468 − 289 =
11. 11.497 + 127 =
12. 12.263 + ? = 687
13. 13.627 − ? = 349
14. 14.408 − 145 =
15. 15.A train has 234 people in the front coaches and 260 people in the back coaches. How many people are on the train?
16. 16.433 + 215 =
17. 17.892 + 105 =
18. 18.A train has 724 people in the front coaches and 248 people in the back coaches. How many people are on the train?
19. 19.384 − ? = 127
20. 20.A school has 241 children. 217 of them are girls. How many boys are there?
21. 21.782 − 529 =
22. 22.? − 324 = 409
23. 23.A train has 892 people in the front coaches and 107 people in the back coaches. How many people are on the train?
24. 24.161 + 259 =
25. 25.516 + ? = 706
26. 26.A school has 511 children. 409 of them are girls. How many boys are there?
27. 27.A school has 580 children. 211 of them are girls. How many boys are there?
28. 28.A train has 134 people in the front coaches and 273 people in the back coaches. How many people are on the train?
29. 29.? − 279 = 265
30. 30.A train has 156 people in the front coaches and 485 people in the back coaches. How many people are on the train?
31. 31.A school has 870 children. 518 of them are girls. How many boys are there?
32. 32.A train has 194 people in the front coaches and 302 people in the back coaches. How many people are on the train?
33. 33.A train has 444 people in the front coaches and 453 people in the back coaches. How many people are on the train?
34. 34.236 − 123 =
35. 35.399 + 411 =
36. 36.? + 173 = 852
37. 37.A train has 186 people in the front coaches and 462 people in the back coaches. How many people are on the train?
38. 38.A school has 300 children. 221 of them are girls. How many boys are there?
39. 39.A school has 341 children. 305 of them are girls. How many boys are there?
40. 40.A train has 709 people in the front coaches and 186 people in the back coaches. How many people are on the train?

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