Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 537 · 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 141 people in the front coaches and 392 people in the back coaches. How many people are on the train?
2. 2.A train has 192 people in the front coaches and 162 people in the back coaches. How many people are on the train?
3. 3.A train has 678 people in the front coaches and 185 people in the back coaches. How many people are on the train?
4. 4.863 − 294 =
5. 5.A train has 338 people in the front coaches and 216 people in the back coaches. How many people are on the train?
6. 6.230 − ? = 121
7. 7.239 − 177 =
8. 8.770 − ? = 574
9. 9.823 − 228 =
10. 10.694 + ? = 993
11. 11.758 + 239 =
12. 12.A school has 324 children. 253 of them are girls. How many boys are there?
13. 13.A school has 666 children. 655 of them are girls. How many boys are there?
14. 14.206 − ? = 65
15. 15.A train has 602 people in the front coaches and 111 people in the back coaches. How many people are on the train?
16. 16.351 − 150 =
17. 17.A train has 538 people in the front coaches and 178 people in the back coaches. How many people are on the train?
18. 18.A school has 339 children. 149 of them are girls. How many boys are there?
19. 19.? − 111 = 237
20. 20.266 − ? = 154
21. 21.A train has 171 people in the front coaches and 250 people in the back coaches. How many people are on the train?
22. 22.777 + 199 =
23. 23.A school has 751 children. 546 of them are girls. How many boys are there?
24. 24.266 − 135 =
25. 25.752 + ? = 897
26. 26.? − 232 = 126
27. 27.437 − 260 =
28. 28.A train has 878 people in the front coaches and 101 people in the back coaches. How many people are on the train?
29. 29.A train has 783 people in the front coaches and 130 people in the back coaches. How many people are on the train?
30. 30.A train has 536 people in the front coaches and 258 people in the back coaches. How many people are on the train?
31. 31.? + 424 = 992
32. 32.A school has 230 children. 186 of them are girls. How many boys are there?
33. 33.844 − 538 =
34. 34.A train has 184 people in the front coaches and 793 people in the back coaches. How many people are on the train?
35. 35.729 + 193 =
36. 36.470 + 500 =
37. 37.782 − ? = 53
38. 38.212 − 120 =
39. 39.A school has 563 children. 185 of them are girls. How many boys are there?
40. 40.A train has 513 people in the front coaches and 158 people in the back coaches. How many people are on the train?

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