Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 434 · 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 418 children. 319 of them are girls. How many boys are there?
2. 2.? − 442 = 132
3. 3.? − 169 = 125
4. 4.192 + 183 =
5. 5.? − 611 = 147
6. 6.A school has 784 children. 218 of them are girls. How many boys are there?
7. 7.? − 271 = 402
8. 8.786 − 165 =
9. 9.498 + 101 =
10. 10.652 − 370 =
11. 11.177 + ? = 443
12. 12.588 + 314 =
13. 13.A school has 726 children. 114 of them are girls. How many boys are there?
14. 14.A train has 814 people in the front coaches and 151 people in the back coaches. How many people are on the train?
15. 15.124 + 322 =
16. 16.630 + ? = 779
17. 17.A train has 261 people in the front coaches and 404 people in the back coaches. How many people are on the train?
18. 18.A school has 822 children. 234 of them are girls. How many boys are there?
19. 19.469 + 442 =
20. 20.A school has 462 children. 204 of them are girls. How many boys are there?
21. 21.A train has 661 people in the front coaches and 327 people in the back coaches. How many people are on the train?
22. 22.A train has 300 people in the front coaches and 247 people in the back coaches. How many people are on the train?
23. 23.A train has 546 people in the front coaches and 219 people in the back coaches. How many people are on the train?
24. 24.A train has 410 people in the front coaches and 189 people in the back coaches. How many people are on the train?
25. 25.499 + 114 =
26. 26.A train has 319 people in the front coaches and 608 people in the back coaches. How many people are on the train?
27. 27.626 − 248 =
28. 28.913 − 312 =
29. 29.? + 485 = 930
30. 30.A school has 248 children. 118 of them are girls. How many boys are there?
31. 31.A train has 185 people in the front coaches and 688 people in the back coaches. How many people are on the train?
32. 32.A school has 235 children. 106 of them are girls. How many boys are there?
33. 33.975 − 157 =
34. 34.A train has 262 people in the front coaches and 731 people in the back coaches. How many people are on the train?
35. 35.222 − 175 =
36. 36.103 + 631 =
37. 37.A school has 561 children. 250 of them are girls. How many boys are there?
38. 38.179 + 584 =
39. 39.451 − ? = 199
40. 40.A school has 403 children. 304 of them are girls. How many boys are there?

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