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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 980 · 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.? − 349 = 87
  2. 2.359 − ? = 252
  3. 3.644 − 103 =
  4. 4.A train has 232 people in the front coaches and 400 people in the back coaches. How many people are on the train?
  5. 5.761 + 202 =
  6. 6.A school has 727 children. 111 of them are girls. How many boys are there?
  7. 7.A school has 684 children. 239 of them are girls. How many boys are there?
  8. 8.A train has 182 people in the front coaches and 447 people in the back coaches. How many people are on the train?
  9. 9.290 − 289 =
  10. 10.203 − ? = 30
  11. 11.325 − 139 =
  12. 12.? + 240 = 868
  13. 13.621 − ? = 409
  14. 14.? − 240 = 169
  15. 15.A school has 276 children. 120 of them are girls. How many boys are there?
  16. 16.554 − 238 =
  17. 17.A school has 554 children. 519 of them are girls. How many boys are there?
  18. 18.200 − 147 =
  19. 19.323 + 362 =
  20. 20.190 + 522 =
  21. 21.243 + 348 =
  22. 22.568 − 563 =
  23. 23.A school has 912 children. 511 of them are girls. How many boys are there?
  24. 24.820 + 105 =
  25. 25.A train has 477 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  26. 26.A school has 862 children. 673 of them are girls. How many boys are there?
  27. 27.A school has 885 children. 580 of them are girls. How many boys are there?
  28. 28.868 + ? = 971
  29. 29.431 + 168 =
  30. 30.347 + ? = 717
  31. 31.863 + ? = 980
  32. 32.A school has 779 children. 432 of them are girls. How many boys are there?
  33. 33.A school has 813 children. 319 of them are girls. How many boys are there?
  34. 34.A school has 820 children. 173 of them are girls. How many boys are there?
  35. 35.182 + ? = 554
  36. 36.426 + 481 =
  37. 37.? + 723 = 913
  38. 38.A train has 386 people in the front coaches and 309 people in the back coaches. How many people are on the train?
  39. 39.A school has 719 children. 590 of them are girls. How many boys are there?
  40. 40.713 + ? = 888

Answer key

  1. 436
  2. 107
  3. 541
  4. 632
  5. 963
  6. 616
  7. 445
  8. 629
  9. 1
  10. 173
  11. 186
  12. 628
  13. 212
  14. 409
  15. 156
  16. 316
  17. 35
  18. 53
  19. 685
  20. 712
  21. 591
  22. 5
  23. 401
  24. 925
  25. 625
  26. 189
  27. 305
  28. 103
  29. 599
  30. 370
  31. 117
  32. 347
  33. 494
  34. 647
  35. 372
  36. 907
  37. 190
  38. 695
  39. 129
  40. 175

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