Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 824 · 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. 1.251 + 571 =
2. 2.591 − 394 =
3. 3.463 + ? = 638
4. 4.505 − 489 =
5. 5.318 + 363 =
6. 6.? + 634 = 826
7. 7.? − 681 = 131
8. 8.915 − ? = 103
9. 9.? − 550 = 112
10. 10.A train has 497 people in the front coaches and 377 people in the back coaches. How many people are on the train?
11. 11.671 − ? = 120
12. 12.709 − 113 =
13. 13.415 − ? = 158
14. 14.958 − ? = 103
15. 15.713 − ? = 22
16. 16.? + 759 = 881
17. 17.A school has 975 children. 945 of them are girls. How many boys are there?
18. 18.260 + 244 =
19. 19.A school has 675 children. 585 of them are girls. How many boys are there?
20. 20.? − 283 = 9
21. 21.A train has 861 people in the front coaches and 137 people in the back coaches. How many people are on the train?
22. 22.908 − 229 =
23. 23.A school has 981 children. 263 of them are girls. How many boys are there?
24. 24.A train has 191 people in the front coaches and 746 people in the back coaches. How many people are on the train?
25. 25.A school has 275 children. 261 of them are girls. How many boys are there?
26. 26.111 + 603 =
27. 27.A school has 622 children. 338 of them are girls. How many boys are there?
28. 28.264 − 139 =
29. 29.A school has 907 children. 117 of them are girls. How many boys are there?
30. 30.860 + 103 =
31. 31.770 − 200 =
32. 32.A school has 665 children. 451 of them are girls. How many boys are there?
33. 33.220 − 162 =
34. 34.857 + ? = 958
35. 35.? + 733 = 835
36. 36.471 − 107 =
37. 37.287 − 207 =
38. 38.? + 491 = 797
39. 39.580 + ? = 695
40. 40.858 − 254 =

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets