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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 19 · 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.? + 243 = 563
  2. 2.378 + ? = 587
  3. 3.? + 597 = 846
  4. 4.? + 455 = 715
  5. 5.A train has 886 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  6. 6.A train has 179 people in the front coaches and 203 people in the back coaches. How many people are on the train?
  7. 7.207 − 133 =
  8. 8.733 − ? = 6
  9. 9.A train has 166 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  10. 10.A train has 358 people in the front coaches and 567 people in the back coaches. How many people are on the train?
  11. 11.166 + 473 =
  12. 12.? − 300 = 176
  13. 13.A school has 499 children. 397 of them are girls. How many boys are there?
  14. 14.421 − 123 =
  15. 15.A train has 152 people in the front coaches and 434 people in the back coaches. How many people are on the train?
  16. 16.760 + ? = 964
  17. 17.A school has 438 children. 183 of them are girls. How many boys are there?
  18. 18.A train has 530 people in the front coaches and 223 people in the back coaches. How many people are on the train?
  19. 19.277 + 643 =
  20. 20.A school has 389 children. 130 of them are girls. How many boys are there?
  21. 21.617 − 311 =
  22. 22.675 + ? = 954
  23. 23.365 − ? = 160
  24. 24.708 + 252 =
  25. 25.A train has 493 people in the front coaches and 326 people in the back coaches. How many people are on the train?
  26. 26.A train has 539 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  27. 27.807 − 329 =
  28. 28.706 − ? = 93
  29. 29.649 + 114 =
  30. 30.A train has 787 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  31. 31.210 − 202 =
  32. 32.745 + ? = 971
  33. 33.A train has 600 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  34. 34.347 − 129 =
  35. 35.? − 272 = 466
  36. 36.? − 235 = 119
  37. 37.720 − 217 =
  38. 38.? − 133 = 529
  39. 39.810 + 109 =
  40. 40.487 + 432 =

Answer key

  1. 320
  2. 209
  3. 249
  4. 260
  5. 995
  6. 382
  7. 74
  8. 727
  9. 334
  10. 925
  11. 639
  12. 476
  13. 102
  14. 298
  15. 586
  16. 204
  17. 255
  18. 753
  19. 920
  20. 259
  21. 306
  22. 279
  23. 205
  24. 960
  25. 819
  26. 671
  27. 478
  28. 613
  29. 763
  30. 938
  31. 8
  32. 226
  33. 854
  34. 218
  35. 738
  36. 354
  37. 503
  38. 662
  39. 919
  40. 919

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