Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 685 · 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. 1.458 − ? = 47
2. 2.696 + ? = 872
3. 3.771 − 466 =
4. 4.351 + ? = 613
5. 5.310 − 202 =
6. 6.A train has 110 people in the front coaches and 110 people in the back coaches. How many people are on the train?
7. 7.? + 669 = 913
8. 8.A school has 256 children. 170 of them are girls. How many boys are there?
9. 9.672 + ? = 897
10. 10.715 + 233 =
11. 11.? − 375 = 24
12. 12.A school has 344 children. 209 of them are girls. How many boys are there?
13. 13.837 + 108 =
14. 14.558 − 516 =
15. 15.A train has 129 people in the front coaches and 437 people in the back coaches. How many people are on the train?
16. 16.? + 365 = 855
17. 17.174 + 577 =
18. 18.579 + 300 =
19. 19.300 + 436 =
20. 20.A school has 738 children. 646 of them are girls. How many boys are there?
21. 21.? − 420 = 387
22. 22.931 − 213 =
23. 23.629 + ? = 746
24. 24.332 − 324 =
25. 25.478 − ? = 276
26. 26.? − 253 = 714
27. 27.358 − ? = 239
28. 28.? − 589 = 235
29. 29.471 − 385 =
30. 30.700 + 277 =
31. 31.A train has 140 people in the front coaches and 682 people in the back coaches. How many people are on the train?
32. 32.848 + 105 =
33. 33.972 − 517 =
34. 34.572 + 399 =
35. 35.A train has 867 people in the front coaches and 128 people in the back coaches. How many people are on the train?
36. 36.? + 313 = 425
37. 37.A school has 455 children. 140 of them are girls. How many boys are there?
38. 38.348 − 268 =
39. 39.236 + 648 =
40. 40.673 + ? = 803

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets