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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 262 · 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.? + 154 = 605
  2. 2.335 − 166 =
  3. 3.A train has 167 people in the front coaches and 401 people in the back coaches. How many people are on the train?
  4. 4.279 − 272 =
  5. 5.930 − 453 =
  6. 6.422 + ? = 890
  7. 7.628 + 312 =
  8. 8.232 − ? = 76
  9. 9.278 + 589 =
  10. 10.965 − ? = 532
  11. 11.A train has 748 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  12. 12.831 − 701 =
  13. 13.295 − 214 =
  14. 14.? − 187 = 445
  15. 15.873 − 234 =
  16. 16.A train has 287 people in the front coaches and 328 people in the back coaches. How many people are on the train?
  17. 17.? + 769 = 937
  18. 18.374 + ? = 887
  19. 19.A train has 672 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  20. 20.A school has 866 children. 166 of them are girls. How many boys are there?
  21. 21.967 − 641 =
  22. 22.350 + ? = 528
  23. 23.523 − ? = 357
  24. 24.413 − 128 =
  25. 25.535 + 240 =
  26. 26.527 − ? = 424
  27. 27.309 − ? = 57
  28. 28.A school has 442 children. 426 of them are girls. How many boys are there?
  29. 29.A train has 228 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  30. 30.A school has 213 children. 175 of them are girls. How many boys are there?
  31. 31.A train has 578 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  32. 32.A school has 894 children. 723 of them are girls. How many boys are there?
  33. 33.? − 104 = 120
  34. 34.928 − ? = 691
  35. 35.214 − ? = 3
  36. 36.A school has 351 children. 265 of them are girls. How many boys are there?
  37. 37.647 − 592 =
  38. 38.390 + 550 =
  39. 39.958 − 300 =
  40. 40.359 + ? = 494

Answer key

  1. 451
  2. 169
  3. 568
  4. 7
  5. 477
  6. 468
  7. 940
  8. 156
  9. 867
  10. 433
  11. 908
  12. 130
  13. 81
  14. 632
  15. 639
  16. 615
  17. 168
  18. 513
  19. 779
  20. 700
  21. 326
  22. 178
  23. 166
  24. 285
  25. 775
  26. 103
  27. 252
  28. 16
  29. 440
  30. 38
  31. 701
  32. 171
  33. 224
  34. 237
  35. 211
  36. 86
  37. 55
  38. 940
  39. 658
  40. 135

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