Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 543 · 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. 1.810 − 457 =
2. 2.A train has 753 people in the front coaches and 200 people in the back coaches. How many people are on the train?
3. 3.A school has 267 children. 150 of them are girls. How many boys are there?
4. 4.983 − 541 =
5. 5.? − 160 = 191
6. 6.402 + ? = 915
7. 7.231 − 221 =
8. 8.725 + ? = 858
9. 9.? − 148 = 846
10. 10.? + 563 = 755
11. 11.? − 549 = 327
12. 12.A train has 314 people in the front coaches and 306 people in the back coaches. How many people are on the train?
13. 13.? + 598 = 955
14. 14.391 − 266 =
15. 15.A school has 449 children. 260 of them are girls. How many boys are there?
16. 16.870 − 338 =
17. 17.731 − 351 =
18. 18.429 − 200 =
19. 19.459 + 180 =
20. 20.506 + 158 =
21. 21.? − 325 = 42
22. 22.316 + 504 =
23. 23.A train has 176 people in the front coaches and 734 people in the back coaches. How many people are on the train?
24. 24.502 − 120 =
25. 25.664 + ? = 861
26. 26.A school has 987 children. 105 of them are girls. How many boys are there?
27. 27.460 + ? = 990
28. 28.461 − 194 =
29. 29.A train has 207 people in the front coaches and 263 people in the back coaches. How many people are on the train?
30. 30.738 − 375 =
31. 31.853 + ? = 962
32. 32.548 + ? = 772
33. 33.975 − ? = 431
34. 34.479 + 384 =
35. 35.613 − 384 =
36. 36.274 − 234 =
37. 37.178 + 360 =
38. 38.422 + 365 =
39. 39.229 − 125 =
40. 40.687 + ? = 942

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