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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 107 · 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 920 children. 832 of them are girls. How many boys are there?
  2. 2.A train has 180 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  3. 3.769 + 127 =
  4. 4.875 − 560 =
  5. 5.A train has 697 people in the front coaches and 198 people in the back coaches. How many people are on the train?
  6. 6.A school has 254 children. 155 of them are girls. How many boys are there?
  7. 7.A school has 596 children. 251 of them are girls. How many boys are there?
  8. 8.342 + 492 =
  9. 9.687 + 183 =
  10. 10.437 − 106 =
  11. 11.617 − 278 =
  12. 12.755 + ? = 985
  13. 13.642 + 289 =
  14. 14.316 + ? = 731
  15. 15.387 + 341 =
  16. 16.A train has 869 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  17. 17.874 − 254 =
  18. 18.441 − 250 =
  19. 19.A train has 528 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  20. 20.531 + 257 =
  21. 21.470 + ? = 968
  22. 22.A train has 131 people in the front coaches and 325 people in the back coaches. How many people are on the train?
  23. 23.? + 796 = 964
  24. 24.A train has 568 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  25. 25.A train has 126 people in the front coaches and 734 people in the back coaches. How many people are on the train?
  26. 26.? + 633 = 841
  27. 27.195 + ? = 802
  28. 28.A school has 412 children. 308 of them are girls. How many boys are there?
  29. 29.A train has 376 people in the front coaches and 270 people in the back coaches. How many people are on the train?
  30. 30.? − 244 = 399
  31. 31.474 − 445 =
  32. 32.772 + 159 =
  33. 33.398 + ? = 695
  34. 34.124 + 337 =
  35. 35.154 + 326 =
  36. 36.A train has 757 people in the front coaches and 122 people in the back coaches. How many people are on the train?
  37. 37.320 + 428 =
  38. 38.966 − 334 =
  39. 39.A school has 625 children. 330 of them are girls. How many boys are there?
  40. 40.654 − 381 =

Answer key

  1. 88
  2. 704
  3. 896
  4. 315
  5. 895
  6. 99
  7. 345
  8. 834
  9. 870
  10. 331
  11. 339
  12. 230
  13. 931
  14. 415
  15. 728
  16. 988
  17. 620
  18. 191
  19. 633
  20. 788
  21. 498
  22. 456
  23. 168
  24. 782
  25. 860
  26. 208
  27. 607
  28. 104
  29. 646
  30. 643
  31. 29
  32. 931
  33. 297
  34. 461
  35. 480
  36. 879
  37. 748
  38. 632
  39. 295
  40. 273

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