Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 656 · 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. 1.847 + 150 =
2. 2.A train has 807 people in the front coaches and 190 people in the back coaches. How many people are on the train?
3. 3.398 − 142 =
4. 4.? − 326 = 525
5. 5.528 − 337 =
6. 6.826 − 679 =
7. 7.879 + ? = 991
8. 8.840 + 148 =
9. 9.218 − 128 =
10. 10.561 + 118 =
11. 11.318 − ? = 211
12. 12.651 − 217 =
13. 13.335 + 553 =
14. 14.? − 263 = 71
15. 15.232 + ? = 740
16. 16.221 + 410 =
17. 17.217 − 169 =
18. 18.A school has 860 children. 323 of them are girls. How many boys are there?
19. 19.973 − 575 =
20. 20.479 − 374 =
21. 21.500 + 291 =
22. 22.247 − 173 =
23. 23.A train has 214 people in the front coaches and 294 people in the back coaches. How many people are on the train?
24. 24.A school has 595 children. 118 of them are girls. How many boys are there?
25. 25.450 − 234 =
26. 26.? + 252 = 500
27. 27.? + 728 = 874
28. 28.901 − ? = 627
29. 29.A school has 488 children. 266 of them are girls. How many boys are there?
30. 30.? − 336 = 132
31. 31.445 + 453 =
32. 32.314 + 125 =
33. 33.787 + 155 =
34. 34.630 + 346 =
35. 35.872 + 124 =
36. 36.655 − 109 =
37. 37.A train has 179 people in the front coaches and 416 people in the back coaches. How many people are on the train?
38. 38.693 − ? = 80
39. 39.A train has 179 people in the front coaches and 633 people in the back coaches. How many people are on the train?
40. 40.A school has 394 children. 242 of them are girls. How many boys are there?

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