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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 190 · 40 sums
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.698 + 156 =
  2. 2.205 + 104 =
  3. 3.A train has 103 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  4. 4.359 − 288 =
  5. 5.528 + 338 =
  6. 6.A school has 935 children. 258 of them are girls. How many boys are there?
  7. 7.A train has 461 people in the front coaches and 363 people in the back coaches. How many people are on the train?
  8. 8.A school has 213 children. 115 of them are girls. How many boys are there?
  9. 9.A school has 955 children. 610 of them are girls. How many boys are there?
  10. 10.604 − 168 =
  11. 11.543 − 304 =
  12. 12.397 − 323 =
  13. 13.A school has 992 children. 482 of them are girls. How many boys are there?
  14. 14.749 − ? = 433
  15. 15.968 − ? = 834
  16. 16.? − 414 = 14
  17. 17.795 + 175 =
  18. 18.175 + 519 =
  19. 19.A train has 695 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  20. 20.649 − 392 =
  21. 21.894 − 211 =
  22. 22.297 + 598 =
  23. 23.A school has 736 children. 478 of them are girls. How many boys are there?
  24. 24.688 + 241 =
  25. 25.? + 189 = 355
  26. 26.640 − 281 =
  27. 27.380 − 316 =
  28. 28.? − 664 = 91
  29. 29.A school has 743 children. 288 of them are girls. How many boys are there?
  30. 30.670 + ? = 889
  31. 31.? + 693 = 914
  32. 32.A train has 665 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  33. 33.A school has 723 children. 488 of them are girls. How many boys are there?
  34. 34.352 + ? = 830
  35. 35.A school has 361 children. 264 of them are girls. How many boys are there?
  36. 36.A train has 652 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  37. 37.592 − ? = 268
  38. 38.? − 560 = 74
  39. 39.A school has 811 children. 634 of them are girls. How many boys are there?
  40. 40.A school has 609 children. 567 of them are girls. How many boys are there?

Answer key

  1. 854
  2. 309
  3. 240
  4. 71
  5. 866
  6. 677
  7. 824
  8. 98
  9. 345
  10. 436
  11. 239
  12. 74
  13. 510
  14. 316
  15. 134
  16. 428
  17. 970
  18. 694
  19. 826
  20. 257
  21. 683
  22. 895
  23. 258
  24. 929
  25. 166
  26. 359
  27. 64
  28. 755
  29. 455
  30. 219
  31. 221
  32. 797
  33. 235
  34. 478
  35. 97
  36. 761
  37. 324
  38. 634
  39. 177
  40. 42

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