Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 7 · 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.? − 237 = 141
2. 2.152 + 754 =
3. 3.208 − 123 =
4. 4.321 + ? = 450
5. 5.223 − 175 =
6. 6.A school has 608 children. 240 of them are girls. How many boys are there?
7. 7.A school has 871 children. 261 of them are girls. How many boys are there?
8. 8.A school has 655 children. 349 of them are girls. How many boys are there?
9. 9.977 − 885 =
10. 10.352 + ? = 496
11. 11.? − 285 = 101
12. 12.? + 498 = 917
13. 13.382 + 396 =
14. 14.? + 125 = 909
15. 15.362 − 104 =
16. 16.654 + 309 =
17. 17.848 − ? = 476
18. 18.A school has 959 children. 553 of them are girls. How many boys are there?
19. 19.911 − ? = 471
20. 20.431 − 156 =
21. 21.275 + 180 =
22. 22.482 + 481 =
23. 23.545 − 509 =
24. 24.711 + 144 =
25. 25.A school has 285 children. 102 of them are girls. How many boys are there?
26. 26.A school has 671 children. 208 of them are girls. How many boys are there?
27. 27.848 − 351 =
28. 28.? + 641 = 906
29. 29.A train has 231 people in the front coaches and 589 people in the back coaches. How many people are on the train?
30. 30.778 − 393 =
31. 31.? − 113 = 679
32. 32.A train has 868 people in the front coaches and 112 people in the back coaches. How many people are on the train?
33. 33.555 − 259 =
34. 34.A train has 277 people in the front coaches and 568 people in the back coaches. How many people are on the train?
35. 35.229 + 431 =
36. 36.624 + ? = 729
37. 37.394 − ? = 253
38. 38.? + 745 = 871
39. 39.449 − 173 =
40. 40.612 − 287 =

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