Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 925 · 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.A train has 463 people in the front coaches and 211 people in the back coaches. How many people are on the train?
2. 2.A train has 593 people in the front coaches and 403 people in the back coaches. How many people are on the train?
3. 3.647 − 526 =
4. 4.256 + 506 =
5. 5.510 − 380 =
6. 6.638 + ? = 808
7. 7.551 − 454 =
8. 8.782 − ? = 84
9. 9.A school has 719 children. 486 of them are girls. How many boys are there?
10. 10.737 − 659 =
11. 11.A train has 266 people in the front coaches and 346 people in the back coaches. How many people are on the train?
12. 12.? + 568 = 738
13. 13.494 + 191 =
14. 14.A train has 236 people in the front coaches and 577 people in the back coaches. How many people are on the train?
15. 15.490 + 480 =
16. 16.481 + ? = 666
17. 17.A train has 753 people in the front coaches and 215 people in the back coaches. How many people are on the train?
18. 18.A train has 478 people in the front coaches and 183 people in the back coaches. How many people are on the train?
19. 19.782 + ? = 917
20. 20.A train has 272 people in the front coaches and 719 people in the back coaches. How many people are on the train?
21. 21.? + 541 = 997
22. 22.? − 200 = 78
23. 23.A train has 523 people in the front coaches and 202 people in the back coaches. How many people are on the train?
24. 24.406 − 160 =
25. 25.153 + 100 =
26. 26.809 + 190 =
27. 27.708 − ? = 524
28. 28.717 + ? = 966
29. 29.547 − 227 =
30. 30.172 + 274 =
31. 31.A train has 138 people in the front coaches and 764 people in the back coaches. How many people are on the train?
32. 32.636 + ? = 776
33. 33.743 − 102 =
34. 34.392 − ? = 57
35. 35.A train has 247 people in the front coaches and 746 people in the back coaches. How many people are on the train?
36. 36.364 + 221 =
37. 37.A train has 196 people in the front coaches and 428 people in the back coaches. How many people are on the train?
38. 38.A school has 229 children. 160 of them are girls. How many boys are there?
39. 39.? + 194 = 797
40. 40.A train has 855 people in the front coaches and 112 people in the back coaches. How many people are on the train?

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