Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 332 · 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. 1.259 − 231 =
2. 2.235 − 127 =
3. 3.812 − 202 =
4. 4.692 − 225 =
5. 5.244 + ? = 894
6. 6.595 − 181 =
7. 7.A train has 613 people in the front coaches and 166 people in the back coaches. How many people are on the train?
8. 8.A school has 864 children. 387 of them are girls. How many boys are there?
9. 9.298 − ? = 81
10. 10.117 + ? = 617
11. 11.334 + 523 =
12. 12.? + 410 = 647
13. 13.615 − ? = 490
14. 14.257 + ? = 599
15. 15.A train has 826 people in the front coaches and 163 people in the back coaches. How many people are on the train?
16. 16.584 − 383 =
17. 17.320 − 158 =
18. 18.352 − ? = 158
19. 19.405 + 217 =
20. 20.142 + 697 =
21. 21.337 + ? = 964
22. 22.396 + 400 =
23. 23.A train has 390 people in the front coaches and 146 people in the back coaches. How many people are on the train?
24. 24.598 + 179 =
25. 25.393 − 236 =
26. 26.660 − ? = 236
27. 27.533 + 279 =
28. 28.834 − 608 =
29. 29.528 + 157 =
30. 30.212 − 108 =
31. 31.581 + 231 =
32. 32.234 − 112 =
33. 33.758 − 505 =
34. 34.137 + 450 =
35. 35.A train has 225 people in the front coaches and 558 people in the back coaches. How many people are on the train?
36. 36.945 − 467 =
37. 37.A school has 819 children. 182 of them are girls. How many boys are there?
38. 38.408 + 505 =
39. 39.813 − ? = 149
40. 40.570 + 325 =

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