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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 297 · 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 258 children. 101 of them are girls. How many boys are there?
  2. 2.571 − 119 =
  3. 3.A train has 540 people in the front coaches and 382 people in the back coaches. How many people are on the train?
  4. 4.551 + ? = 691
  5. 5.A school has 421 children. 138 of them are girls. How many boys are there?
  6. 6.459 − 362 =
  7. 7.500 + 180 =
  8. 8.A train has 277 people in the front coaches and 237 people in the back coaches. How many people are on the train?
  9. 9.A school has 513 children. 250 of them are girls. How many boys are there?
  10. 10.753 − ? = 587
  11. 11.? + 583 = 809
  12. 12.142 + 149 =
  13. 13.500 − 402 =
  14. 14.801 − 505 =
  15. 15.878 − 650 =
  16. 16.? + 188 = 800
  17. 17.689 − 294 =
  18. 18.A school has 427 children. 139 of them are girls. How many boys are there?
  19. 19.A school has 955 children. 254 of them are girls. How many boys are there?
  20. 20.830 − ? = 215
  21. 21.A school has 873 children. 683 of them are girls. How many boys are there?
  22. 22.? + 879 = 993
  23. 23.691 + 290 =
  24. 24.A school has 415 children. 181 of them are girls. How many boys are there?
  25. 25.307 − ? = 108
  26. 26.279 + 552 =
  27. 27.428 + ? = 902
  28. 28.A train has 251 people in the front coaches and 607 people in the back coaches. How many people are on the train?
  29. 29.A train has 427 people in the front coaches and 396 people in the back coaches. How many people are on the train?
  30. 30.888 + 101 =
  31. 31.269 − ? = 48
  32. 32.563 + ? = 986
  33. 33.702 + 274 =
  34. 34.602 − ? = 107
  35. 35.117 + ? = 721
  36. 36.A train has 450 people in the front coaches and 278 people in the back coaches. How many people are on the train?
  37. 37.A train has 284 people in the front coaches and 530 people in the back coaches. How many people are on the train?
  38. 38.A school has 523 children. 304 of them are girls. How many boys are there?
  39. 39.? − 134 = 173
  40. 40.A train has 391 people in the front coaches and 476 people in the back coaches. How many people are on the train?

Answer key

  1. 157
  2. 452
  3. 922
  4. 140
  5. 283
  6. 97
  7. 680
  8. 514
  9. 263
  10. 166
  11. 226
  12. 291
  13. 98
  14. 296
  15. 228
  16. 612
  17. 395
  18. 288
  19. 701
  20. 615
  21. 190
  22. 114
  23. 981
  24. 234
  25. 199
  26. 831
  27. 474
  28. 858
  29. 823
  30. 989
  31. 221
  32. 423
  33. 976
  34. 495
  35. 604
  36. 728
  37. 814
  38. 219
  39. 307
  40. 867

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