Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 887 · 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.? − 117 = 342
2. 2.663 − 181 =
3. 3.787 + 119 =
4. 4.? − 516 = 209
5. 5.? − 197 = 346
6. 6.367 + 128 =
7. 7.A school has 514 children. 213 of them are girls. How many boys are there?
8. 8.805 + 137 =
9. 9.555 + 405 =
10. 10.A train has 463 people in the front coaches and 192 people in the back coaches. How many people are on the train?
11. 11.A school has 376 children. 305 of them are girls. How many boys are there?
12. 12.466 − 159 =
13. 13.379 − 187 =
14. 14.762 − ? = 481
15. 15.? − 459 = 464
16. 16.411 − 146 =
17. 17.? + 790 = 927
18. 18.351 − ? = 107
19. 19.A train has 436 people in the front coaches and 313 people in the back coaches. How many people are on the train?
20. 20.A train has 394 people in the front coaches and 316 people in the back coaches. How many people are on the train?
21. 21.680 − 331 =
22. 22.709 − 350 =
23. 23.769 − 633 =
24. 24.905 − 714 =
25. 25.A school has 371 children. 172 of them are girls. How many boys are there?
26. 26.906 − 381 =
27. 27.A school has 958 children. 562 of them are girls. How many boys are there?
28. 28.252 + 524 =
29. 29.485 + 192 =
30. 30.602 − 601 =
31. 31.178 + 302 =
32. 32.A train has 705 people in the front coaches and 136 people in the back coaches. How many people are on the train?
33. 33.854 + 130 =
34. 34.406 − ? = 79
35. 35.540 + ? = 690
36. 36.A train has 506 people in the front coaches and 102 people in the back coaches. How many people are on the train?
37. 37.792 − 506 =
38. 38.? + 394 = 656
39. 39.842 + 132 =
40. 40.207 + ? = 716

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