Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 607 · 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 train has 729 people in the front coaches and 215 people in the back coaches. How many people are on the train?
2. 2.330 − 139 =
3. 3.489 − ? = 126
4. 4.604 − 600 =
5. 5.? − 454 = 194
6. 6.260 + ? = 693
7. 7.441 + 408 =
8. 8.801 − ? = 301
9. 9.325 − 245 =
10. 10.910 − 213 =
11. 11.170 + 764 =
12. 12.386 − 239 =
13. 13.302 − 254 =
14. 14.410 + 254 =
15. 15.A school has 789 children. 179 of them are girls. How many boys are there?
16. 16.896 + 102 =
17. 17.? − 333 = 571
18. 18.618 + 110 =
19. 19.372 − 161 =
20. 20.A school has 694 children. 625 of them are girls. How many boys are there?
21. 21.383 − 268 =
22. 22.A school has 309 children. 203 of them are girls. How many boys are there?
23. 23.654 + 315 =
24. 24.585 − ? = 421
25. 25.278 − 233 =
26. 26.A school has 537 children. 300 of them are girls. How many boys are there?
27. 27.803 + 133 =
28. 28.? − 135 = 352
29. 29.A train has 651 people in the front coaches and 181 people in the back coaches. How many people are on the train?
30. 30.? + 623 = 734
31. 31.745 + 109 =
32. 32.A train has 234 people in the front coaches and 238 people in the back coaches. How many people are on the train?
33. 33.467 − ? = 237
34. 34.A school has 606 children. 182 of them are girls. How many boys are there?
35. 35.? − 210 = 132
36. 36.? + 133 = 269
37. 37.611 − 525 =
38. 38.712 − ? = 218
39. 39.444 + 444 =
40. 40.? + 339 = 526

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