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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 593 · 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 663 children. 444 of them are girls. How many boys are there?
  2. 2.? − 200 = 138
  3. 3.A school has 734 children. 703 of them are girls. How many boys are there?
  4. 4.A school has 781 children. 695 of them are girls. How many boys are there?
  5. 5.? + 222 = 725
  6. 6.A train has 573 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  7. 7.750 + 198 =
  8. 8.A train has 384 people in the front coaches and 339 people in the back coaches. How many people are on the train?
  9. 9.A train has 202 people in the front coaches and 539 people in the back coaches. How many people are on the train?
  10. 10.A train has 130 people in the front coaches and 273 people in the back coaches. How many people are on the train?
  11. 11.A train has 156 people in the front coaches and 331 people in the back coaches. How many people are on the train?
  12. 12.321 − ? = 97
  13. 13.354 + ? = 661
  14. 14.437 + 514 =
  15. 15.? − 250 = 4
  16. 16.? − 610 = 315
  17. 17.A train has 504 people in the front coaches and 439 people in the back coaches. How many people are on the train?
  18. 18.755 + ? = 886
  19. 19.A school has 477 children. 131 of them are girls. How many boys are there?
  20. 20.300 − 102 =
  21. 21.A school has 368 children. 349 of them are girls. How many boys are there?
  22. 22.? − 528 = 61
  23. 23.? − 734 = 73
  24. 24.497 + ? = 680
  25. 25.668 + 113 =
  26. 26.A school has 650 children. 355 of them are girls. How many boys are there?
  27. 27.304 − 187 =
  28. 28.238 + 366 =
  29. 29.675 + 241 =
  30. 30.A school has 460 children. 265 of them are girls. How many boys are there?
  31. 31.397 + 288 =
  32. 32.981 − 796 =
  33. 33.831 − 427 =
  34. 34.A school has 547 children. 254 of them are girls. How many boys are there?
  35. 35.? + 543 = 814
  36. 36.A train has 371 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  37. 37.? + 581 = 912
  38. 38.? + 242 = 727
  39. 39.998 − 782 =
  40. 40.A train has 596 people in the front coaches and 260 people in the back coaches. How many people are on the train?

Answer key

  1. 219
  2. 338
  3. 31
  4. 86
  5. 503
  6. 690
  7. 948
  8. 723
  9. 741
  10. 403
  11. 487
  12. 224
  13. 307
  14. 951
  15. 254
  16. 925
  17. 943
  18. 131
  19. 346
  20. 198
  21. 19
  22. 589
  23. 807
  24. 183
  25. 781
  26. 295
  27. 117
  28. 604
  29. 916
  30. 195
  31. 685
  32. 185
  33. 404
  34. 293
  35. 271
  36. 487
  37. 331
  38. 485
  39. 216
  40. 856

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