Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 659 · 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.? − 195 = 157
2. 2.891 − ? = 323
3. 3.106 + 280 =
4. 4.A school has 650 children. 548 of them are girls. How many boys are there?
5. 5.735 + ? = 954
6. 6.490 + ? = 625
7. 7.A train has 544 people in the front coaches and 133 people in the back coaches. How many people are on the train?
8. 8.384 − 224 =
9. 9.527 + 204 =
10. 10.? + 513 = 693
11. 11.585 + ? = 976
12. 12.388 − 359 =
13. 13.678 − 346 =
14. 14.564 − ? = 357
15. 15.401 + 148 =
16. 16.263 − ? = 140
17. 17.A school has 952 children. 267 of them are girls. How many boys are there?
18. 18.712 − ? = 54
19. 19.814 − ? = 336
20. 20.205 − 189 =
21. 21.A train has 373 people in the front coaches and 169 people in the back coaches. How many people are on the train?
22. 22.A school has 723 children. 681 of them are girls. How many boys are there?
23. 23.? − 467 = 285
24. 24.? − 207 = 164
25. 25.719 − ? = 184
26. 26.? + 313 = 495
27. 27.A school has 349 children. 176 of them are girls. How many boys are there?
28. 28.? + 699 = 831
29. 29.? − 322 = 385
30. 30.A school has 409 children. 239 of them are girls. How many boys are there?
31. 31.582 + 205 =
32. 32.531 + 443 =
33. 33.A train has 768 people in the front coaches and 182 people in the back coaches. How many people are on the train?
34. 34.A train has 509 people in the front coaches and 319 people in the back coaches. How many people are on the train?
35. 35.838 − 350 =
36. 36.? + 637 = 906
37. 37.352 + ? = 830
38. 38.298 − 100 =
39. 39.842 + ? = 992
40. 40.? − 203 = 75

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