Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 773 · 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. 1.692 − 605 =
2. 2.720 + 106 =
3. 3.397 − 132 =
4. 4.A train has 895 people in the front coaches and 100 people in the back coaches. How many people are on the train?
5. 5.109 + 267 =
6. 6.583 + 192 =
7. 7.812 − 522 =
8. 8.A train has 635 people in the front coaches and 158 people in the back coaches. How many people are on the train?
9. 9.290 + 601 =
10. 10.? − 595 = 261
11. 11.754 + 185 =
12. 12.557 + 133 =
13. 13.574 − 160 =
14. 14.479 + 361 =
15. 15.382 + ? = 663
16. 16.272 + ? = 543
17. 17.? − 340 = 128
18. 18.? + 143 = 710
19. 19.? − 120 = 153
20. 20.985 − 807 =
21. 21.237 − 174 =
22. 22.? − 173 = 77
23. 23.771 + ? = 926
24. 24.605 + 301 =
25. 25.A school has 598 children. 228 of them are girls. How many boys are there?
26. 26.? − 598 = 267
27. 27.323 − 230 =
28. 28.202 − 104 =
29. 29.805 − 677 =
30. 30.243 + ? = 555
31. 31.? + 859 = 963
32. 32.A school has 771 children. 181 of them are girls. How many boys are there?
33. 33.548 + ? = 811
34. 34.564 − 422 =
35. 35.? + 635 = 799
36. 36.? + 229 = 441
37. 37.A school has 893 children. 613 of them are girls. How many boys are there?
38. 38.719 − 640 =
39. 39.233 + 325 =
40. 40.162 + ? = 677

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