Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 127 · 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. 1.552 + 422 =
2. 2.A school has 264 children. 262 of them are girls. How many boys are there?
3. 3.223 + 100 =
4. 4.429 + ? = 566
5. 5.246 − ? = 15
6. 6.861 − ? = 581
7. 7.923 − ? = 310
8. 8.A school has 297 children. 150 of them are girls. How many boys are there?
9. 9.364 − 323 =
10. 10.A school has 892 children. 416 of them are girls. How many boys are there?
11. 11.631 + ? = 958
12. 12.120 + 299 =
13. 13.674 − 287 =
14. 14.647 − 511 =
15. 15.716 − 237 =
16. 16.839 + ? = 992
17. 17.814 + ? = 994
18. 18.593 + 340 =
19. 19.360 + 146 =
20. 20.186 + 319 =
21. 21.A school has 575 children. 539 of them are girls. How many boys are there?
22. 22.512 − ? = 384
23. 23.579 + ? = 770
24. 24.595 − 490 =
25. 25.A school has 356 children. 183 of them are girls. How many boys are there?
26. 26.674 + ? = 947
27. 27.972 − ? = 676
28. 28.A train has 747 people in the front coaches and 235 people in the back coaches. How many people are on the train?
29. 29.? − 276 = 96
30. 30.? − 175 = 677
31. 31.263 − 208 =
32. 32.A train has 308 people in the front coaches and 152 people in the back coaches. How many people are on the train?
33. 33.702 − 317 =
34. 34.? + 236 = 642
35. 35.221 − ? = 100
36. 36.? − 172 = 258
37. 37.230 − ? = 93
38. 38.540 + ? = 970
39. 39.950 − ? = 439
40. 40.877 − 163 =

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