Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 392 · 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. 1.667 + ? = 992
2. 2.695 − 291 =
3. 3.656 + ? = 872
4. 4.A train has 313 people in the front coaches and 408 people in the back coaches. How many people are on the train?
5. 5.? + 410 = 970
6. 6.? + 303 = 734
7. 7.860 + ? = 980
8. 8.641 − 212 =
9. 9.A train has 496 people in the front coaches and 424 people in the back coaches. How many people are on the train?
10. 10.709 + 213 =
11. 11.711 + ? = 932
12. 12.A school has 209 children. 106 of them are girls. How many boys are there?
13. 13.A train has 438 people in the front coaches and 174 people in the back coaches. How many people are on the train?
14. 14.281 + 435 =
15. 15.956 − 700 =
16. 16.271 + 412 =
17. 17.303 + 424 =
18. 18.714 + 245 =
19. 19.A train has 748 people in the front coaches and 189 people in the back coaches. How many people are on the train?
20. 20.969 − ? = 380
21. 21.? + 299 = 443
22. 22.790 + 115 =
23. 23.145 + 259 =
24. 24.705 + 265 =
25. 25.668 + 168 =
26. 26.? + 785 = 911
27. 27.? + 355 = 759
28. 28.293 − 285 =
29. 29.414 − 111 =
30. 30.A train has 219 people in the front coaches and 612 people in the back coaches. How many people are on the train?
31. 31.703 − 281 =
32. 32.726 − ? = 280
33. 33.335 + 577 =
34. 34.731 + ? = 943
35. 35.223 + 455 =
36. 36.521 + 131 =
37. 37.650 − 543 =
38. 38.? − 205 = 85
39. 39.? + 655 = 980
40. 40.716 + ? = 840

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