Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 966 · 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. 1.473 + ? = 945
2. 2.710 + ? = 965
3. 3.? − 204 = 109
4. 4.? + 854 = 973
5. 5.862 + 131 =
6. 6.? + 510 = 641
7. 7.575 − 112 =
8. 8.620 + ? = 838
9. 9.746 + 100 =
10. 10.A train has 133 people in the front coaches and 702 people in the back coaches. How many people are on the train?
11. 11.746 + 146 =
12. 12.654 + 198 =
13. 13.? + 716 = 818
14. 14.309 − 216 =
15. 15.A school has 444 children. 344 of them are girls. How many boys are there?
16. 16.648 − 344 =
17. 17.? − 120 = 318
18. 18.303 + 245 =
19. 19.579 + 276 =
20. 20.872 − 494 =
21. 21.245 + ? = 414
22. 22.385 + 389 =
23. 23.713 − 460 =
24. 24.A school has 290 children. 120 of them are girls. How many boys are there?
25. 25.944 − 737 =
26. 26.626 + 250 =
27. 27.A train has 842 people in the front coaches and 136 people in the back coaches. How many people are on the train?
28. 28.? − 292 = 198
29. 29.303 + 457 =
30. 30.A train has 226 people in the front coaches and 189 people in the back coaches. How many people are on the train?
31. 31.104 + 753 =
32. 32.724 + 235 =
33. 33.A train has 412 people in the front coaches and 129 people in the back coaches. How many people are on the train?
34. 34.255 + ? = 384
35. 35.558 + 380 =
36. 36.A school has 829 children. 717 of them are girls. How many boys are there?
37. 37.355 + ? = 772
38. 38.503 + 346 =
39. 39.312 + ? = 901
40. 40.399 + 384 =

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