Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 44 · 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. 1.784 + 106 =
2. 2.A school has 212 children. 137 of them are girls. How many boys are there?
3. 3.101 + ? = 414
4. 4.389 + 479 =
5. 5.779 − 519 =
6. 6.? − 198 = 26
7. 7.A train has 565 people in the front coaches and 113 people in the back coaches. How many people are on the train?
8. 8.? + 753 = 891
9. 9.202 + ? = 935
10. 10.526 + 217 =
11. 11.? − 261 = 192
12. 12.542 − ? = 373
13. 13.810 − ? = 212
14. 14.A school has 464 children. 460 of them are girls. How many boys are there?
15. 15.958 − 695 =
16. 16.? − 758 = 102
17. 17.711 − ? = 29
18. 18.? − 394 = 114
19. 19.A train has 146 people in the front coaches and 714 people in the back coaches. How many people are on the train?
20. 20.? + 587 = 947
21. 21.A train has 245 people in the front coaches and 472 people in the back coaches. How many people are on the train?
22. 22.851 − 696 =
23. 23.895 − 716 =
24. 24.361 − 299 =
25. 25.527 − 367 =
26. 26.482 + 216 =
27. 27.? − 325 = 183
28. 28.? − 183 = 450
29. 29.364 − ? = 53
30. 30.189 + 400 =
31. 31.A school has 737 children. 516 of them are girls. How many boys are there?
32. 32.A train has 568 people in the front coaches and 112 people in the back coaches. How many people are on the train?
33. 33.115 + ? = 906
34. 34.422 − ? = 303
35. 35.A school has 905 children. 875 of them are girls. How many boys are there?
36. 36.421 − ? = 244
37. 37.780 + 171 =
38. 38.265 + 432 =
39. 39.753 + 217 =
40. 40.818 − 619 =

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