Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 996 · 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. 1.214 − ? = 16
2. 2.217 − 145 =
3. 3.659 + 158 =
4. 4.272 + ? = 577
5. 5.269 − 167 =
6. 6.541 − ? = 60
7. 7.A train has 443 people in the front coaches and 150 people in the back coaches. How many people are on the train?
8. 8.A train has 494 people in the front coaches and 153 people in the back coaches. How many people are on the train?
9. 9.A train has 766 people in the front coaches and 215 people in the back coaches. How many people are on the train?
10. 10.? + 369 = 775
11. 11.820 + 115 =
12. 12.201 + 581 =
13. 13.? + 194 = 881
14. 14.? − 270 = 61
15. 15.215 + 557 =
16. 16.398 − 157 =
17. 17.838 − 755 =
18. 18.? − 544 = 194
19. 19.542 + ? = 888
20. 20.611 + 188 =
21. 21.109 + 861 =
22. 22.A school has 908 children. 604 of them are girls. How many boys are there?
23. 23.A train has 557 people in the front coaches and 233 people in the back coaches. How many people are on the train?
24. 24.? − 114 = 412
25. 25.A school has 952 children. 820 of them are girls. How many boys are there?
26. 26.744 − 708 =
27. 27.255 + 289 =
28. 28.828 − ? = 156
29. 29.607 + 203 =
30. 30.? − 168 = 146
31. 31.732 + 133 =
32. 32.853 + 106 =
33. 33.410 − 101 =
34. 34.349 + 251 =
35. 35.977 − 787 =
36. 36.419 − 325 =
37. 37.241 − 200 =
38. 38.A train has 361 people in the front coaches and 526 people in the back coaches. How many people are on the train?
39. 39.A train has 843 people in the front coaches and 116 people in the back coaches. How many people are on the train?
40. 40.? + 285 = 806

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