Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 804 · 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 647 people in the front coaches and 291 people in the back coaches. How many people are on the train?
2. 2.A train has 806 people in the front coaches and 158 people in the back coaches. How many people are on the train?
3. 3.839 − ? = 402
4. 4.818 − 578 =
5. 5.496 + ? = 862
6. 6.471 − 415 =
7. 7.779 − 316 =
8. 8.800 + ? = 928
9. 9.171 + 804 =
10. 10.491 + 250 =
11. 11.739 + 242 =
12. 12.? − 203 = 218
13. 13.420 − 201 =
14. 14.436 + 428 =
15. 15.290 − 281 =
16. 16.626 + 218 =
17. 17.342 + ? = 849
18. 18.249 − 110 =
19. 19.? − 451 = 5
20. 20.A train has 333 people in the front coaches and 303 people in the back coaches. How many people are on the train?
21. 21.311 − 224 =
22. 22.855 − ? = 433
23. 23.396 + ? = 592
24. 24.A train has 644 people in the front coaches and 258 people in the back coaches. How many people are on the train?
25. 25.? + 542 = 837
26. 26.251 − 104 =
27. 27.A train has 754 people in the front coaches and 133 people in the back coaches. How many people are on the train?
28. 28.A train has 732 people in the front coaches and 108 people in the back coaches. How many people are on the train?
29. 29.571 − 513 =
30. 30.? + 417 = 988
31. 31.220 + ? = 449
32. 32.430 + 126 =
33. 33.207 − 205 =
34. 34.A school has 409 children. 208 of them are girls. How many boys are there?
35. 35.421 − 388 =
36. 36.476 + 516 =
37. 37.791 − 162 =
38. 38.? − 115 = 780
39. 39.? − 258 = 694
40. 40.756 + ? = 887

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