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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 330 · 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. 1.819 + 133 =
  2. 2.822 − 818 =
  3. 3.A school has 922 children. 566 of them are girls. How many boys are there?
  4. 4.? − 517 = 4
  5. 5.? + 176 = 803
  6. 6.913 − 752 =
  7. 7.991 − 963 =
  8. 8.129 + 473 =
  9. 9.755 + 192 =
  10. 10.472 + 111 =
  11. 11.A school has 551 children. 323 of them are girls. How many boys are there?
  12. 12.A train has 359 people in the front coaches and 438 people in the back coaches. How many people are on the train?
  13. 13.A school has 826 children. 449 of them are girls. How many boys are there?
  14. 14.372 − ? = 5
  15. 15.811 + 137 =
  16. 16.159 + 297 =
  17. 17.A train has 298 people in the front coaches and 471 people in the back coaches. How many people are on the train?
  18. 18.? + 314 = 865
  19. 19.824 − 245 =
  20. 20.A train has 749 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  21. 21.A school has 687 children. 331 of them are girls. How many boys are there?
  22. 22.693 − 368 =
  23. 23.A train has 131 people in the front coaches and 341 people in the back coaches. How many people are on the train?
  24. 24.A train has 515 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  25. 25.? + 296 = 706
  26. 26.245 − ? = 85
  27. 27.195 + 571 =
  28. 28.? + 104 = 818
  29. 29.302 + ? = 734
  30. 30.A train has 129 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  31. 31.397 − 380 =
  32. 32.598 − 455 =
  33. 33.467 − 327 =
  34. 34.641 + 168 =
  35. 35.? + 413 = 613
  36. 36.742 − 664 =
  37. 37.A school has 709 children. 487 of them are girls. How many boys are there?
  38. 38.206 − ? = 78
  39. 39.750 + 187 =
  40. 40.A train has 164 people in the front coaches and 663 people in the back coaches. How many people are on the train?

Answer key

  1. 952
  2. 4
  3. 356
  4. 521
  5. 627
  6. 161
  7. 28
  8. 602
  9. 947
  10. 583
  11. 228
  12. 797
  13. 377
  14. 367
  15. 948
  16. 456
  17. 769
  18. 551
  19. 579
  20. 962
  21. 356
  22. 325
  23. 472
  24. 628
  25. 410
  26. 160
  27. 766
  28. 714
  29. 432
  30. 281
  31. 17
  32. 143
  33. 140
  34. 809
  35. 200
  36. 78
  37. 222
  38. 128
  39. 937
  40. 827

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