Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 775 · 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 185 people in the front coaches and 303 people in the back coaches. How many people are on the train?
2. 2.? + 201 = 611
3. 3.177 + 358 =
4. 4.? − 130 = 247
5. 5.139 + 636 =
6. 6.A school has 682 children. 136 of them are girls. How many boys are there?
7. 7.A train has 108 people in the front coaches and 100 people in the back coaches. How many people are on the train?
8. 8.852 + ? = 961
9. 9.434 + ? = 676
10. 10.775 − ? = 548
11. 11.335 + 614 =
12. 12.235 + ? = 874
13. 13.A train has 317 people in the front coaches and 666 people in the back coaches. How many people are on the train?
14. 14.855 + 107 =
15. 15.545 − 359 =
16. 16.512 + 167 =
17. 17.A school has 374 children. 348 of them are girls. How many boys are there?
18. 18.868 + 118 =
19. 19.309 − 155 =
20. 20.? + 132 = 248
21. 21.313 + ? = 414
22. 22.A school has 597 children. 367 of them are girls. How many boys are there?
23. 23.A school has 740 children. 166 of them are girls. How many boys are there?
24. 24.A train has 175 people in the front coaches and 663 people in the back coaches. How many people are on the train?
25. 25.548 − ? = 257
26. 26.424 − 169 =
27. 27.411 + 574 =
28. 28.457 − ? = 100
29. 29.547 − 476 =
30. 30.142 + 187 =
31. 31.479 − 399 =
32. 32.? − 495 = 468
33. 33.? + 656 = 904
34. 34.? + 770 = 935
35. 35.? − 513 = 80
36. 36.A train has 856 people in the front coaches and 130 people in the back coaches. How many people are on the train?
37. 37.714 + ? = 997
38. 38.820 − 184 =
39. 39.757 + 232 =
40. 40.760 + 109 =

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