Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 111 · 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 594 people in the front coaches and 200 people in the back coaches. How many people are on the train?
2. 2.806 − ? = 28
3. 3.106 + ? = 782
4. 4.A school has 889 children. 506 of them are girls. How many boys are there?
5. 5.A school has 625 children. 304 of them are girls. How many boys are there?
6. 6.625 + 304 =
7. 7.269 + 344 =
8. 8.A train has 601 people in the front coaches and 118 people in the back coaches. How many people are on the train?
9. 9.755 − ? = 100
10. 10.715 + ? = 860
11. 11.755 − ? = 377
12. 12.? − 217 = 405
13. 13.A train has 880 people in the front coaches and 108 people in the back coaches. How many people are on the train?
14. 14.? − 227 = 271
15. 15.984 − 245 =
16. 16.A train has 434 people in the front coaches and 433 people in the back coaches. How many people are on the train?
17. 17.A school has 344 children. 166 of them are girls. How many boys are there?
18. 18.A school has 497 children. 281 of them are girls. How many boys are there?
19. 19.631 − 526 =
20. 20.278 − 221 =
21. 21.537 − ? = 168
22. 22.? − 458 = 173
23. 23.A train has 664 people in the front coaches and 103 people in the back coaches. How many people are on the train?
24. 24.180 + 600 =
25. 25.? − 305 = 182
26. 26.439 − ? = 193
27. 27.A train has 224 people in the front coaches and 657 people in the back coaches. How many people are on the train?
28. 28.896 + 102 =
29. 29.203 − 149 =
30. 30.A train has 543 people in the front coaches and 159 people in the back coaches. How many people are on the train?
31. 31.? + 624 = 950
32. 32.494 + 479 =
33. 33.A school has 224 children. 106 of them are girls. How many boys are there?
34. 34.A train has 235 people in the front coaches and 209 people in the back coaches. How many people are on the train?
35. 35.390 + ? = 755
36. 36.A school has 542 children. 392 of them are girls. How many boys are there?
37. 37.? + 348 = 585
38. 38.439 − 344 =
39. 39.? + 377 = 712
40. 40.A train has 437 people in the front coaches and 170 people in the back coaches. How many people are on the train?

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