Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 48 · 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. 1.865 − 835 =
2. 2.A school has 355 children. 185 of them are girls. How many boys are there?
3. 3.A school has 216 children. 175 of them are girls. How many boys are there?
4. 4.A train has 348 people in the front coaches and 574 people in the back coaches. How many people are on the train?
5. 5.442 − 300 =
6. 6.271 + ? = 540
7. 7.709 − 289 =
8. 8.573 − ? = 307
9. 9.635 − 187 =
10. 10.629 + 297 =
11. 11.844 − 632 =
12. 12.A school has 500 children. 324 of them are girls. How many boys are there?
13. 13.A train has 155 people in the front coaches and 320 people in the back coaches. How many people are on the train?
14. 14.180 + 152 =
15. 15.164 + ? = 872
16. 16.366 − 287 =
17. 17.A school has 947 children. 722 of them are girls. How many boys are there?
18. 18.? − 446 = 421
19. 19.A train has 677 people in the front coaches and 294 people in the back coaches. How many people are on the train?
20. 20.421 − 328 =
21. 21.A school has 478 children. 120 of them are girls. How many boys are there?
22. 22.570 − ? = 19
23. 23.317 − 255 =
24. 24.A train has 247 people in the front coaches and 541 people in the back coaches. How many people are on the train?
25. 25.A school has 356 children. 118 of them are girls. How many boys are there?
26. 26.779 + ? = 936
27. 27.884 + 113 =
28. 28.A school has 535 children. 475 of them are girls. How many boys are there?
29. 29.554 − 247 =
30. 30.337 − ? = 71
31. 31.314 − 144 =
32. 32.A train has 270 people in the front coaches and 207 people in the back coaches. How many people are on the train?
33. 33.A train has 595 people in the front coaches and 161 people in the back coaches. How many people are on the train?
34. 34.A train has 544 people in the front coaches and 404 people in the back coaches. How many people are on the train?
35. 35.A train has 460 people in the front coaches and 103 people in the back coaches. How many people are on the train?
36. 36.A school has 742 children. 193 of them are girls. How many boys are there?
37. 37.A train has 431 people in the front coaches and 288 people in the back coaches. How many people are on the train?
38. 38.? − 195 = 124
39. 39.A school has 957 children. 562 of them are girls. How many boys are there?
40. 40.396 + ? = 841

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