Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 183 · 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. 1.327 + 444 =
2. 2.718 + 211 =
3. 3.A train has 727 people in the front coaches and 172 people in the back coaches. How many people are on the train?
4. 4.850 − 154 =
5. 5.807 − 434 =
6. 6.A train has 229 people in the front coaches and 249 people in the back coaches. How many people are on the train?
7. 7.557 + 421 =
8. 8.695 + 212 =
9. 9.A train has 664 people in the front coaches and 299 people in the back coaches. How many people are on the train?
10. 10.254 − ? = 101
11. 11.? + 558 = 755
12. 12.A train has 810 people in the front coaches and 119 people in the back coaches. How many people are on the train?
13. 13.355 + 297 =
14. 14.A school has 924 children. 332 of them are girls. How many boys are there?
15. 15.510 + ? = 768
16. 16.A school has 901 children. 700 of them are girls. How many boys are there?
17. 17.435 − ? = 203
18. 18.? − 817 = 162
19. 19.801 + 184 =
20. 20.A train has 653 people in the front coaches and 177 people in the back coaches. How many people are on the train?
21. 21.630 + 312 =
22. 22.319 − ? = 28
23. 23.? + 403 = 532
24. 24.A train has 358 people in the front coaches and 249 people in the back coaches. How many people are on the train?
25. 25.265 + 624 =
26. 26.207 + ? = 420
27. 27.A train has 400 people in the front coaches and 398 people in the back coaches. How many people are on the train?
28. 28.210 + 478 =
29. 29.403 − ? = 279
30. 30.382 + 240 =
31. 31.A train has 895 people in the front coaches and 101 people in the back coaches. How many people are on the train?
32. 32.173 + 696 =
33. 33.422 − 182 =
34. 34.A train has 425 people in the front coaches and 427 people in the back coaches. How many people are on the train?
35. 35.A school has 504 children. 210 of them are girls. How many boys are there?
36. 36.A school has 616 children. 346 of them are girls. How many boys are there?
37. 37.A school has 245 children. 225 of them are girls. How many boys are there?
38. 38.A train has 209 people in the front coaches and 573 people in the back coaches. How many people are on the train?
39. 39.A school has 220 children. 149 of them are girls. How many boys are there?
40. 40.A train has 359 people in the front coaches and 233 people in the back coaches. How many people are on the train?

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