Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 845 · 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. 1.819 + 178 =
2. 2.A school has 343 children. 176 of them are girls. How many boys are there?
3. 3.374 − 150 =
4. 4.390 − 113 =
5. 5.439 + 537 =
6. 6.? + 507 = 923
7. 7.311 + ? = 846
8. 8.A school has 390 children. 304 of them are girls. How many boys are there?
9. 9.322 + 188 =
10. 10.A school has 547 children. 187 of them are girls. How many boys are there?
11. 11.760 − 603 =
12. 12.548 − 313 =
13. 13.793 + 196 =
14. 14.829 − 213 =
15. 15.450 + 230 =
16. 16.? + 675 = 892
17. 17.815 − 257 =
18. 18.329 + ? = 498
19. 19.458 − 436 =
20. 20.A train has 416 people in the front coaches and 533 people in the back coaches. How many people are on the train?
21. 21.582 + 252 =
22. 22.473 + 309 =
23. 23.323 − 128 =
24. 24.A school has 607 children. 447 of them are girls. How many boys are there?
25. 25.? − 205 = 61
26. 26.922 − 397 =
27. 27.A school has 512 children. 118 of them are girls. How many boys are there?
28. 28.770 − ? = 165
29. 29.A school has 223 children. 203 of them are girls. How many boys are there?
30. 30.A train has 406 people in the front coaches and 490 people in the back coaches. How many people are on the train?
31. 31.892 + 100 =
32. 32.251 − ? = 76
33. 33.A school has 639 children. 598 of them are girls. How many boys are there?
34. 34.538 + 461 =
35. 35.A school has 704 children. 444 of them are girls. How many boys are there?
36. 36.263 − ? = 125
37. 37.905 − 816 =
38. 38.594 − ? = 129
39. 39.? − 256 = 475
40. 40.A school has 698 children. 329 of them are girls. How many boys are there?

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