Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 997 · 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. 1.342 − ? = 132
2. 2.554 − ? = 84
3. 3.651 − ? = 367
4. 4.319 + 374 =
5. 5.A train has 450 people in the front coaches and 465 people in the back coaches. How many people are on the train?
6. 6.276 − 230 =
7. 7.556 + 264 =
8. 8.? + 467 = 652
9. 9.847 − ? = 584
10. 10.723 + 116 =
11. 11.A train has 617 people in the front coaches and 305 people in the back coaches. How many people are on the train?
12. 12.516 + 482 =
13. 13.A school has 510 children. 300 of them are girls. How many boys are there?
14. 14.? + 232 = 929
15. 15.768 − ? = 583
16. 16.753 − 375 =
17. 17.811 + 175 =
18. 18.A school has 711 children. 617 of them are girls. How many boys are there?
19. 19.255 + 283 =
20. 20.394 + 252 =
21. 21.299 + ? = 760
22. 22.542 + 250 =
23. 23.553 − 164 =
24. 24.? + 198 = 687
25. 25.737 + 179 =
26. 26.506 − ? = 340
27. 27.458 − ? = 119
28. 28.418 + 182 =
29. 29.912 − 367 =
30. 30.A school has 914 children. 310 of them are girls. How many boys are there?
31. 31.A school has 420 children. 232 of them are girls. How many boys are there?
32. 32.844 − 278 =
33. 33.? + 845 = 979
34. 34.A school has 277 children. 110 of them are girls. How many boys are there?
35. 35.567 + 137 =
36. 36.609 + ? = 765
37. 37.A train has 125 people in the front coaches and 658 people in the back coaches. How many people are on the train?
38. 38.812 − 271 =
39. 39.342 + 595 =
40. 40.A school has 465 children. 251 of them are girls. How many boys are there?

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