Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 298 · 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 686 people in the front coaches and 276 people in the back coaches. How many people are on the train?
2. 2.A school has 335 children. 228 of them are girls. How many boys are there?
3. 3.935 − 632 =
4. 4.A school has 967 children. 589 of them are girls. How many boys are there?
5. 5.789 − ? = 376
6. 6.288 − ? = 26
7. 7.A train has 199 people in the front coaches and 248 people in the back coaches. How many people are on the train?
8. 8.721 + 170 =
9. 9.A school has 747 children. 214 of them are girls. How many boys are there?
10. 10.A train has 138 people in the front coaches and 535 people in the back coaches. How many people are on the train?
11. 11.A train has 550 people in the front coaches and 434 people in the back coaches. How many people are on the train?
12. 12.? + 767 = 885
13. 13.302 − 141 =
14. 14.A train has 301 people in the front coaches and 333 people in the back coaches. How many people are on the train?
15. 15.567 − 566 =
16. 16.362 − 185 =
17. 17.A train has 194 people in the front coaches and 290 people in the back coaches. How many people are on the train?
18. 18.334 − 219 =
19. 19.701 − 111 =
20. 20.A train has 630 people in the front coaches and 360 people in the back coaches. How many people are on the train?
21. 21.? + 859 = 960
22. 22.632 + ? = 949
23. 23.659 + 155 =
24. 24.270 − 227 =
25. 25.A train has 343 people in the front coaches and 236 people in the back coaches. How many people are on the train?
26. 26.A school has 395 children. 373 of them are girls. How many boys are there?
27. 27.623 + ? = 822
28. 28.685 + ? = 868
29. 29.747 − 266 =
30. 30.373 + 251 =
31. 31.A train has 181 people in the front coaches and 316 people in the back coaches. How many people are on the train?
32. 32.161 + ? = 839
33. 33.A school has 965 children. 366 of them are girls. How many boys are there?
34. 34.420 + 488 =
35. 35.293 + 162 =
36. 36.A train has 687 people in the front coaches and 243 people in the back coaches. How many people are on the train?
37. 37.? − 302 = 511
38. 38.718 − 468 =
39. 39.308 − 104 =
40. 40.426 + 486 =

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