Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 601 · 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 162 people in the front coaches and 463 people in the back coaches. How many people are on the train?
2. 2.? + 237 = 973
3. 3.419 + ? = 638
4. 4.A train has 319 people in the front coaches and 303 people in the back coaches. How many people are on the train?
5. 5.A train has 125 people in the front coaches and 629 people in the back coaches. How many people are on the train?
6. 6.? + 424 = 634
7. 7.A school has 818 children. 291 of them are girls. How many boys are there?
8. 8.816 − 389 =
9. 9.773 + 112 =
10. 10.? − 161 = 645
11. 11.587 + ? = 797
12. 12.886 + 108 =
13. 13.? + 851 = 988
14. 14.A train has 458 people in the front coaches and 467 people in the back coaches. How many people are on the train?
15. 15.559 + 308 =
16. 16.A school has 560 children. 460 of them are girls. How many boys are there?
17. 17.A train has 281 people in the front coaches and 136 people in the back coaches. How many people are on the train?
18. 18.513 − ? = 358
19. 19.205 + ? = 923
20. 20.490 − 201 =
21. 21.? + 733 = 997
22. 22.368 + ? = 754
23. 23.997 − 966 =
24. 24.373 − 248 =
25. 25.A train has 541 people in the front coaches and 450 people in the back coaches. How many people are on the train?
26. 26.509 + 388 =
27. 27.978 − 604 =
28. 28.? + 723 = 875
29. 29.? + 271 = 610
30. 30.216 − ? = 87
31. 31.A train has 395 people in the front coaches and 462 people in the back coaches. How many people are on the train?
32. 32.560 − 213 =
33. 33.360 − ? = 233
34. 34.A school has 387 children. 221 of them are girls. How many boys are there?
35. 35.A train has 190 people in the front coaches and 216 people in the back coaches. How many people are on the train?
36. 36.A school has 788 children. 615 of them are girls. How many boys are there?
37. 37.A train has 621 people in the front coaches and 334 people in the back coaches. How many people are on the train?
38. 38.A train has 109 people in the front coaches and 857 people in the back coaches. How many people are on the train?
39. 39.A school has 984 children. 751 of them are girls. How many boys are there?
40. 40.499 − 271 =

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