Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 567 · 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. 1.521 + 171 =
2. 2.A train has 200 people in the front coaches and 761 people in the back coaches. How many people are on the train?
3. 3.213 + 407 =
4. 4.941 − 427 =
5. 5.413 + 313 =
6. 6.A school has 209 children. 119 of them are girls. How many boys are there?
7. 7.458 + ? = 609
8. 8.A school has 447 children. 229 of them are girls. How many boys are there?
9. 9.477 + 327 =
10. 10.A school has 327 children. 296 of them are girls. How many boys are there?
11. 11.? + 795 = 945
12. 12.337 + 373 =
13. 13.284 + ? = 835
14. 14.945 − 363 =
15. 15.? − 137 = 78
16. 16.A train has 832 people in the front coaches and 149 people in the back coaches. How many people are on the train?
17. 17.468 + 168 =
18. 18.? − 380 = 556
19. 19.561 − ? = 255
20. 20.275 + 239 =
21. 21.734 − ? = 459
22. 22.620 + 133 =
23. 23.777 − 113 =
24. 24.A school has 612 children. 139 of them are girls. How many boys are there?
25. 25.767 + 126 =
26. 26.A school has 408 children. 151 of them are girls. How many boys are there?
27. 27.? − 218 = 62
28. 28.484 − 448 =
29. 29.964 − 561 =
30. 30.855 − ? = 714
31. 31.A train has 793 people in the front coaches and 143 people in the back coaches. How many people are on the train?
32. 32.217 + 271 =
33. 33.413 + 489 =
34. 34.754 − 400 =
35. 35.A train has 601 people in the front coaches and 103 people in the back coaches. How many people are on the train?
36. 36.886 − 316 =
37. 37.534 + ? = 735
38. 38.394 + ? = 826
39. 39.337 − 325 =
40. 40.790 − ? = 309

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