Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 217 · 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. 1.773 + ? = 902
2. 2.A school has 561 children. 498 of them are girls. How many boys are there?
3. 3.550 + 402 =
4. 4.402 + 217 =
5. 5.A train has 250 people in the front coaches and 217 people in the back coaches. How many people are on the train?
6. 6.823 + ? = 972
7. 7.279 + ? = 554
8. 8.852 + ? = 999
9. 9.249 + 409 =
10. 10.863 − ? = 231
11. 11.613 − ? = 318
12. 12.522 − 115 =
13. 13.A train has 155 people in the front coaches and 532 people in the back coaches. How many people are on the train?
14. 14.A train has 557 people in the front coaches and 235 people in the back coaches. How many people are on the train?
15. 15.404 − ? = 12
16. 16.395 − 137 =
17. 17.? − 264 = 237
18. 18.244 + 416 =
19. 19.? + 384 = 753
20. 20.879 − 468 =
21. 21.192 + 807 =
22. 22.290 − ? = 183
23. 23.204 + ? = 755
24. 24.139 + 599 =
25. 25.? + 789 = 961
26. 26.215 − 148 =
27. 27.279 − 201 =
28. 28.595 + 220 =
29. 29.454 + 310 =
30. 30.A school has 379 children. 274 of them are girls. How many boys are there?
31. 31.A train has 198 people in the front coaches and 722 people in the back coaches. How many people are on the train?
32. 32.308 − ? = 183
33. 33.722 − 548 =
34. 34.788 − 420 =
35. 35.163 + 834 =
36. 36.732 − 212 =
37. 37.? − 191 = 263
38. 38.875 + 122 =
39. 39.A train has 101 people in the front coaches and 210 people in the back coaches. How many people are on the train?
40. 40.256 + 223 =

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