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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 613 · 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.A school has 229 children. 109 of them are girls. How many boys are there?
  2. 2.? + 343 = 795
  3. 3.835 + ? = 948
  4. 4.358 + 593 =
  5. 5.228 − 176 =
  6. 6.A train has 672 people in the front coaches and 275 people in the back coaches. How many people are on the train?
  7. 7.524 + 419 =
  8. 8.A school has 938 children. 196 of them are girls. How many boys are there?
  9. 9.161 + ? = 578
  10. 10.456 − ? = 285
  11. 11.284 + ? = 489
  12. 12.818 + 152 =
  13. 13.823 − 220 =
  14. 14.? − 162 = 404
  15. 15.A school has 242 children. 105 of them are girls. How many boys are there?
  16. 16.? + 507 = 885
  17. 17.652 − 617 =
  18. 18.A train has 194 people in the front coaches and 653 people in the back coaches. How many people are on the train?
  19. 19.276 − ? = 37
  20. 20.A train has 234 people in the front coaches and 539 people in the back coaches. How many people are on the train?
  21. 21.822 + ? = 968
  22. 22.A train has 308 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  23. 23.573 + ? = 734
  24. 24.689 + 156 =
  25. 25.972 − 428 =
  26. 26.264 + 535 =
  27. 27.437 + ? = 808
  28. 28.744 + 235 =
  29. 29.A school has 851 children. 142 of them are girls. How many boys are there?
  30. 30.146 + ? = 358
  31. 31.A train has 136 people in the front coaches and 355 people in the back coaches. How many people are on the train?
  32. 32.306 + ? = 776
  33. 33.644 + 257 =
  34. 34.452 − ? = 266
  35. 35.128 + 723 =
  36. 36.152 + ? = 636
  37. 37.133 + 253 =
  38. 38.A train has 135 people in the front coaches and 617 people in the back coaches. How many people are on the train?
  39. 39.A train has 378 people in the front coaches and 308 people in the back coaches. How many people are on the train?
  40. 40.A school has 797 children. 460 of them are girls. How many boys are there?

Answer key

  1. 120
  2. 452
  3. 113
  4. 951
  5. 52
  6. 947
  7. 943
  8. 742
  9. 417
  10. 171
  11. 205
  12. 970
  13. 603
  14. 566
  15. 137
  16. 378
  17. 35
  18. 847
  19. 239
  20. 773
  21. 146
  22. 433
  23. 161
  24. 845
  25. 544
  26. 799
  27. 371
  28. 979
  29. 709
  30. 212
  31. 491
  32. 470
  33. 901
  34. 186
  35. 851
  36. 484
  37. 386
  38. 752
  39. 686
  40. 337

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