Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 353 · 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. 1.443 + 337 =
2. 2.A school has 247 children. 221 of them are girls. How many boys are there?
3. 3.A school has 593 children. 525 of them are girls. How many boys are there?
4. 4.618 − ? = 154
5. 5.A train has 299 people in the front coaches and 152 people in the back coaches. How many people are on the train?
6. 6.602 − 199 =
7. 7.968 − 282 =
8. 8.A train has 723 people in the front coaches and 107 people in the back coaches. How many people are on the train?
9. 9.322 + ? = 730
10. 10.720 − 103 =
11. 11.375 + 128 =
12. 12.A school has 738 children. 173 of them are girls. How many boys are there?
13. 13.992 − ? = 809
14. 14.138 + 234 =
15. 15.A train has 314 people in the front coaches and 271 people in the back coaches. How many people are on the train?
16. 16.332 + 102 =
17. 17.? + 753 = 862
18. 18.? − 153 = 720
19. 19.613 − 299 =
20. 20.A train has 318 people in the front coaches and 677 people in the back coaches. How many people are on the train?
21. 21.A train has 849 people in the front coaches and 138 people in the back coaches. How many people are on the train?
22. 22.547 − 208 =
23. 23.? − 918 = 36
24. 24.591 − 221 =
25. 25.A school has 327 children. 319 of them are girls. How many boys are there?
26. 26.? − 440 = 102
27. 27.? − 489 = 497
28. 28.859 + ? = 989
29. 29.877 − ? = 455
30. 30.A train has 828 people in the front coaches and 149 people in the back coaches. How many people are on the train?
31. 31.762 − 724 =
32. 32.A train has 849 people in the front coaches and 110 people in the back coaches. How many people are on the train?
33. 33.A train has 309 people in the front coaches and 481 people in the back coaches. How many people are on the train?
34. 34.A train has 136 people in the front coaches and 504 people in the back coaches. How many people are on the train?
35. 35.A school has 812 children. 284 of them are girls. How many boys are there?
36. 36.972 − 939 =
37. 37.304 − 183 =
38. 38.486 − 358 =
39. 39.A school has 211 children. 203 of them are girls. How many boys are there?
40. 40.A train has 247 people in the front coaches and 200 people in the back coaches. How many people are on the train?

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