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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 477 · 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.? − 377 = 369
  2. 2.296 − 119 =
  3. 3.A train has 643 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  4. 4.A train has 875 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  5. 5.? + 296 = 968
  6. 6.161 + ? = 937
  7. 7.A train has 343 people in the front coaches and 654 people in the back coaches. How many people are on the train?
  8. 8.A train has 316 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  9. 9.? + 107 = 716
  10. 10.304 − ? = 171
  11. 11.896 + ? = 996
  12. 12.994 − ? = 483
  13. 13.693 − 115 =
  14. 14.? + 726 = 966
  15. 15.225 − 189 =
  16. 16.A train has 660 people in the front coaches and 122 people in the back coaches. How many people are on the train?
  17. 17.786 − 333 =
  18. 18.123 + ? = 273
  19. 19.A train has 811 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  20. 20.558 + 312 =
  21. 21.? + 452 = 824
  22. 22.? − 639 = 259
  23. 23.338 − 265 =
  24. 24.A train has 544 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  25. 25.? + 477 = 894
  26. 26.A train has 844 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  27. 27.A train has 453 people in the front coaches and 386 people in the back coaches. How many people are on the train?
  28. 28.621 + ? = 939
  29. 29.316 − ? = 153
  30. 30.449 + ? = 554
  31. 31.813 + 152 =
  32. 32.521 − 274 =
  33. 33.864 − 209 =
  34. 34.A school has 682 children. 294 of them are girls. How many boys are there?
  35. 35.246 + 115 =
  36. 36.225 − 134 =
  37. 37.415 − 155 =
  38. 38.306 + 332 =
  39. 39.A train has 455 people in the front coaches and 455 people in the back coaches. How many people are on the train?
  40. 40.A school has 536 children. 522 of them are girls. How many boys are there?

Answer key

  1. 746
  2. 177
  3. 773
  4. 975
  5. 672
  6. 776
  7. 997
  8. 593
  9. 609
  10. 133
  11. 100
  12. 511
  13. 578
  14. 240
  15. 36
  16. 782
  17. 453
  18. 150
  19. 924
  20. 870
  21. 372
  22. 898
  23. 73
  24. 827
  25. 417
  26. 999
  27. 839
  28. 318
  29. 163
  30. 105
  31. 965
  32. 247
  33. 655
  34. 388
  35. 361
  36. 91
  37. 260
  38. 638
  39. 910
  40. 14

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