Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 437 · 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. 1.217 + ? = 959
2. 2.436 + 168 =
3. 3.A train has 290 people in the front coaches and 617 people in the back coaches. How many people are on the train?
4. 4.A school has 984 children. 121 of them are girls. How many boys are there?
5. 5.A train has 812 people in the front coaches and 113 people in the back coaches. How many people are on the train?
6. 6.A train has 418 people in the front coaches and 302 people in the back coaches. How many people are on the train?
7. 7.A school has 317 children. 116 of them are girls. How many boys are there?
8. 8.A train has 706 people in the front coaches and 197 people in the back coaches. How many people are on the train?
9. 9.A train has 632 people in the front coaches and 244 people in the back coaches. How many people are on the train?
10. 10.150 + 231 =
11. 11.178 + 467 =
12. 12.A train has 375 people in the front coaches and 258 people in the back coaches. How many people are on the train?
13. 13.? − 100 = 148
14. 14.A train has 618 people in the front coaches and 197 people in the back coaches. How many people are on the train?
15. 15.617 − ? = 261
16. 16.459 + ? = 872
17. 17.877 − 152 =
18. 18.A school has 554 children. 145 of them are girls. How many boys are there?
19. 19.442 + 398 =
20. 20.A train has 452 people in the front coaches and 428 people in the back coaches. How many people are on the train?
21. 21.695 − ? = 450
22. 22.A train has 211 people in the front coaches and 219 people in the back coaches. How many people are on the train?
23. 23.706 + 278 =
24. 24.A school has 898 children. 604 of them are girls. How many boys are there?
25. 25.751 + 233 =
26. 26.859 − 211 =
27. 27.392 − 373 =
28. 28.167 + 394 =
29. 29.869 + ? = 992
30. 30.A school has 945 children. 152 of them are girls. How many boys are there?
31. 31.646 − ? = 530
32. 32.A train has 770 people in the front coaches and 198 people in the back coaches. How many people are on the train?
33. 33.637 − ? = 404
34. 34.? − 250 = 645
35. 35.521 + 116 =
36. 36.A train has 652 people in the front coaches and 346 people in the back coaches. How many people are on the train?
37. 37.A school has 264 children. 134 of them are girls. How many boys are there?
38. 38.? − 141 = 100
39. 39.? − 144 = 167
40. 40.652 + 285 =

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