Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 610 · 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.A train has 325 people in the front coaches and 547 people in the back coaches. How many people are on the train?
2. 2.A school has 245 children. 200 of them are girls. How many boys are there?
3. 3.792 − ? = 619
4. 4.798 − 276 =
5. 5.? + 128 = 508
6. 6.823 + ? = 982
7. 7.A train has 505 people in the front coaches and 266 people in the back coaches. How many people are on the train?
8. 8.343 + 282 =
9. 9.869 + ? = 972
10. 10.977 − 975 =
11. 11.395 − 303 =
12. 12.A train has 184 people in the front coaches and 104 people in the back coaches. How many people are on the train?
13. 13.677 − 351 =
14. 14.? − 113 = 182
15. 15.258 + 640 =
16. 16.A school has 711 children. 277 of them are girls. How many boys are there?
17. 17.371 − 367 =
18. 18.332 + ? = 664
19. 19.A train has 832 people in the front coaches and 164 people in the back coaches. How many people are on the train?
20. 20.A school has 287 children. 216 of them are girls. How many boys are there?
21. 21.471 − 352 =
22. 22.316 + 626 =
23. 23.A train has 885 people in the front coaches and 101 people in the back coaches. How many people are on the train?
24. 24.A school has 727 children. 465 of them are girls. How many boys are there?
25. 25.A train has 331 people in the front coaches and 110 people in the back coaches. How many people are on the train?
26. 26.468 + 118 =
27. 27.115 + ? = 971
28. 28.? + 469 = 953
29. 29.A train has 831 people in the front coaches and 124 people in the back coaches. How many people are on the train?
30. 30.503 + 224 =
31. 31.725 + 144 =
32. 32.884 + 106 =
33. 33.A school has 850 children. 475 of them are girls. How many boys are there?
34. 34.267 + 500 =
35. 35.A train has 732 people in the front coaches and 252 people in the back coaches. How many people are on the train?
36. 36.296 − ? = 101
37. 37.430 + ? = 712
38. 38.A train has 305 people in the front coaches and 558 people in the back coaches. How many people are on the train?
39. 39.228 − 165 =
40. 40.A train has 276 people in the front coaches and 250 people in the back coaches. How many people are on the train?

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