Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 983 · 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. 1.407 − 199 =
2. 2.961 − 323 =
3. 3.546 + ? = 832
4. 4.893 + 101 =
5. 5.974 − 695 =
6. 6.? + 778 = 891
7. 7.829 − 111 =
8. 8.? − 108 = 138
9. 9.274 − ? = 22
10. 10.245 + 469 =
11. 11.840 − 465 =
12. 12.522 − 300 =
13. 13.339 + 214 =
14. 14.929 − 871 =
15. 15.A train has 148 people in the front coaches and 213 people in the back coaches. How many people are on the train?
16. 16.680 + 126 =
17. 17.774 + 134 =
18. 18.673 + ? = 792
19. 19.? + 454 = 683
20. 20.271 − 264 =
21. 21.458 + ? = 625
22. 22.533 + 392 =
23. 23.? − 125 = 194
24. 24.474 − ? = 194
25. 25.A school has 845 children. 792 of them are girls. How many boys are there?
26. 26.299 + 223 =
27. 27.953 − 912 =
28. 28.594 − 586 =
29. 29.A train has 536 people in the front coaches and 407 people in the back coaches. How many people are on the train?
30. 30.452 + 466 =
31. 31.236 + 748 =
32. 32.321 − ? = 73
33. 33.A train has 386 people in the front coaches and 583 people in the back coaches. How many people are on the train?
34. 34.A train has 231 people in the front coaches and 184 people in the back coaches. How many people are on the train?
35. 35.725 + 119 =
36. 36.890 + ? = 999
37. 37.A school has 258 children. 122 of them are girls. How many boys are there?
38. 38.A school has 580 children. 244 of them are girls. How many boys are there?
39. 39.A school has 521 children. 483 of them are girls. How many boys are there?
40. 40.A school has 942 children. 805 of them are girls. How many boys are there?

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