Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 214 · 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. 1.241 − 138 =
2. 2.A train has 185 people in the front coaches and 649 people in the back coaches. How many people are on the train?
3. 3.266 + ? = 488
4. 4.A school has 985 children. 192 of them are girls. How many boys are there?
5. 5.804 + 189 =
6. 6.A school has 775 children. 383 of them are girls. How many boys are there?
7. 7.A train has 576 people in the front coaches and 335 people in the back coaches. How many people are on the train?
8. 8.687 − ? = 159
9. 9.334 + 105 =
10. 10.827 − 325 =
11. 11.A train has 550 people in the front coaches and 439 people in the back coaches. How many people are on the train?
12. 12.351 + 321 =
13. 13.494 − 131 =
14. 14.890 − ? = 496
15. 15.A school has 641 children. 350 of them are girls. How many boys are there?
16. 16.737 − 684 =
17. 17.? − 466 = 47
18. 18.669 + 125 =
19. 19.965 − 696 =
20. 20.417 + 196 =
21. 21.A train has 301 people in the front coaches and 587 people in the back coaches. How many people are on the train?
22. 22.583 − 569 =
23. 23.265 − 136 =
24. 24.665 − ? = 285
25. 25.575 + 169 =
26. 26.A school has 737 children. 206 of them are girls. How many boys are there?
27. 27.311 + 490 =
28. 28.915 − 889 =
29. 29.986 − ? = 139
30. 30.750 + 101 =
31. 31.629 + ? = 988
32. 32.243 − 123 =
33. 33.681 − ? = 62
34. 34.440 − 269 =
35. 35.158 + 466 =
36. 36.? − 169 = 107
37. 37.774 + 221 =
38. 38.? − 428 = 393
39. 39.683 − ? = 446
40. 40.784 − 776 =

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