Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 178 · 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.? − 198 = 109
2. 2.442 − 232 =
3. 3.205 − 132 =
4. 4.A train has 392 people in the front coaches and 465 people in the back coaches. How many people are on the train?
5. 5.526 + 127 =
6. 6.471 − 411 =
7. 7.342 − 289 =
8. 8.220 + ? = 788
9. 9.? − 159 = 62
10. 10.A school has 478 children. 421 of them are girls. How many boys are there?
11. 11.775 + 148 =
12. 12.A train has 478 people in the front coaches and 277 people in the back coaches. How many people are on the train?
13. 13.392 − 351 =
14. 14.A train has 424 people in the front coaches and 358 people in the back coaches. How many people are on the train?
15. 15.504 + ? = 676
16. 16.843 − ? = 654
17. 17.413 − 400 =
18. 18.715 − 138 =
19. 19.954 − 923 =
20. 20.A school has 465 children. 134 of them are girls. How many boys are there?
21. 21.878 − 835 =
22. 22.689 − 637 =
23. 23.922 − 194 =
24. 24.A train has 641 people in the front coaches and 176 people in the back coaches. How many people are on the train?
25. 25.A school has 683 children. 404 of them are girls. How many boys are there?
26. 26.A school has 246 children. 103 of them are girls. How many boys are there?
27. 27.? + 888 = 988
28. 28.? − 617 = 35
29. 29.A school has 481 children. 443 of them are girls. How many boys are there?
30. 30.240 − 149 =
31. 31.A school has 458 children. 447 of them are girls. How many boys are there?
32. 32.457 + 120 =
33. 33.895 + 100 =
34. 34.783 − 702 =
35. 35.849 + 116 =
36. 36.? − 162 = 356
37. 37.798 + ? = 955
38. 38.230 − 101 =
39. 39.381 − 219 =
40. 40.699 − 473 =

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