Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 222 · 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. 1.469 + 188 =
2. 2.259 − 231 =
3. 3.290 − 229 =
4. 4.299 − 207 =
5. 5.202 − ? = 58
6. 6.A school has 911 children. 282 of them are girls. How many boys are there?
7. 7.? − 589 = 329
8. 8.A train has 282 people in the front coaches and 431 people in the back coaches. How many people are on the train?
9. 9.452 + 289 =
10. 10.509 − ? = 289
11. 11.711 + 201 =
12. 12.? − 120 = 371
13. 13.A school has 300 children. 150 of them are girls. How many boys are there?
14. 14.A school has 267 children. 140 of them are girls. How many boys are there?
15. 15.A school has 290 children. 163 of them are girls. How many boys are there?
16. 16.250 − ? = 86
17. 17.639 + 261 =
18. 18.854 + 137 =
19. 19.325 + 122 =
20. 20.863 + 123 =
21. 21.315 + 549 =
22. 22.843 + 105 =
23. 23.803 + 134 =
24. 24.A school has 214 children. 146 of them are girls. How many boys are there?
25. 25.380 + ? = 898
26. 26.? + 564 = 752
27. 27.A school has 781 children. 766 of them are girls. How many boys are there?
28. 28.A train has 170 people in the front coaches and 459 people in the back coaches. How many people are on the train?
29. 29.908 − 592 =
30. 30.A school has 684 children. 292 of them are girls. How many boys are there?
31. 31.347 − 127 =
32. 32.? − 146 = 275
33. 33.197 + ? = 710
34. 34.144 + ? = 836
35. 35.113 + 254 =
36. 36.A school has 283 children. 212 of them are girls. How many boys are there?
37. 37.462 + 420 =
38. 38.754 − 261 =
39. 39.909 − 590 =
40. 40.837 + ? = 984

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