Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 284 · 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.A school has 887 children. 423 of them are girls. How many boys are there?
2. 2.A train has 367 people in the front coaches and 516 people in the back coaches. How many people are on the train?
3. 3.313 + ? = 683
4. 4.763 − 264 =
5. 5.903 − ? = 322
6. 6.413 + ? = 647
7. 7.394 + ? = 692
8. 8.468 + 109 =
9. 9.707 − 137 =
10. 10.331 − 195 =
11. 11.A school has 860 children. 151 of them are girls. How many boys are there?
12. 12.? − 277 = 269
13. 13.554 − 468 =
14. 14.556 + ? = 768
15. 15.? − 130 = 243
16. 16.399 − 240 =
17. 17.A school has 952 children. 537 of them are girls. How many boys are there?
18. 18.669 + 218 =
19. 19.? + 579 = 999
20. 20.A train has 626 people in the front coaches and 175 people in the back coaches. How many people are on the train?
21. 21.437 + 508 =
22. 22.372 − 107 =
23. 23.428 − 272 =
24. 24.754 − 124 =
25. 25.A school has 347 children. 246 of them are girls. How many boys are there?
26. 26.853 + 118 =
27. 27.941 − 205 =
28. 28.737 − 491 =
29. 29.676 − 272 =
30. 30.828 + 134 =
31. 31.? + 741 = 878
32. 32.302 − 118 =
33. 33.358 − 195 =
34. 34.? − 251 = 643
35. 35.549 + 359 =
36. 36.A school has 216 children. 112 of them are girls. How many boys are there?
37. 37.? + 306 = 740
38. 38.650 − 430 =
39. 39.221 + 108 =
40. 40.A school has 839 children. 327 of them are girls. How many boys are there?

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