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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 837 · 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.? − 186 = 374
  2. 2.267 − 233 =
  3. 3.814 − 152 =
  4. 4.785 + 114 =
  5. 5.373 + 591 =
  6. 6.469 + 473 =
  7. 7.A school has 383 children. 241 of them are girls. How many boys are there?
  8. 8.A school has 714 children. 196 of them are girls. How many boys are there?
  9. 9.? − 583 = 127
  10. 10.A train has 203 people in the front coaches and 409 people in the back coaches. How many people are on the train?
  11. 11.594 − ? = 261
  12. 12.A school has 549 children. 416 of them are girls. How many boys are there?
  13. 13.829 + 141 =
  14. 14.920 − 178 =
  15. 15.? + 772 = 892
  16. 16.? − 661 = 224
  17. 17.A train has 538 people in the front coaches and 232 people in the back coaches. How many people are on the train?
  18. 18.461 − ? = 70
  19. 19.A train has 358 people in the front coaches and 567 people in the back coaches. How many people are on the train?
  20. 20.A train has 497 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  21. 21.612 + 152 =
  22. 22.668 − 663 =
  23. 23.? + 512 = 656
  24. 24.927 − ? = 69
  25. 25.604 + ? = 802
  26. 26.A train has 782 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  27. 27.538 − 440 =
  28. 28.798 − 758 =
  29. 29.309 + 153 =
  30. 30.204 − 120 =
  31. 31.782 + 172 =
  32. 32.420 − 141 =
  33. 33.271 − ? = 52
  34. 34.A train has 245 people in the front coaches and 423 people in the back coaches. How many people are on the train?
  35. 35.149 + 195 =
  36. 36.A train has 705 people in the front coaches and 258 people in the back coaches. How many people are on the train?
  37. 37.566 + ? = 700
  38. 38.748 + 172 =
  39. 39.425 + 441 =
  40. 40.506 + 491 =

Answer key

  1. 560
  2. 34
  3. 662
  4. 899
  5. 964
  6. 942
  7. 142
  8. 518
  9. 710
  10. 612
  11. 333
  12. 133
  13. 970
  14. 742
  15. 120
  16. 885
  17. 770
  18. 391
  19. 925
  20. 710
  21. 764
  22. 5
  23. 144
  24. 858
  25. 198
  26. 883
  27. 98
  28. 40
  29. 462
  30. 84
  31. 954
  32. 279
  33. 219
  34. 668
  35. 344
  36. 963
  37. 134
  38. 920
  39. 866
  40. 997

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