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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 470 · 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. 1.851 + ? = 954
  2. 2.160 + ? = 670
  3. 3.468 − 322 =
  4. 4.A train has 124 people in the front coaches and 395 people in the back coaches. How many people are on the train?
  5. 5.602 − 375 =
  6. 6.A school has 239 children. 133 of them are girls. How many boys are there?
  7. 7.257 − 155 =
  8. 8.? − 563 = 30
  9. 9.A train has 810 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  10. 10.A school has 409 children. 357 of them are girls. How many boys are there?
  11. 11.382 − 186 =
  12. 12.? − 296 = 208
  13. 13.366 + ? = 476
  14. 14.539 + 407 =
  15. 15.458 − ? = 277
  16. 16.A train has 179 people in the front coaches and 417 people in the back coaches. How many people are on the train?
  17. 17.899 − 118 =
  18. 18.873 + ? = 977
  19. 19.721 + ? = 973
  20. 20.863 + 129 =
  21. 21.325 − 267 =
  22. 22.? − 167 = 74
  23. 23.A school has 942 children. 760 of them are girls. How many boys are there?
  24. 24.537 − 156 =
  25. 25.? + 585 = 696
  26. 26.A train has 349 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  27. 27.729 − 205 =
  28. 28.A school has 972 children. 342 of them are girls. How many boys are there?
  29. 29.? + 463 = 873
  30. 30.306 + 511 =
  31. 31.A school has 258 children. 124 of them are girls. How many boys are there?
  32. 32.A train has 437 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  33. 33.A school has 281 children. 129 of them are girls. How many boys are there?
  34. 34.853 + 114 =
  35. 35.A school has 336 children. 121 of them are girls. How many boys are there?
  36. 36.A school has 430 children. 107 of them are girls. How many boys are there?
  37. 37.A train has 453 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  38. 38.617 + 279 =
  39. 39.A school has 233 children. 130 of them are girls. How many boys are there?
  40. 40.802 − 243 =

Answer key

  1. 103
  2. 510
  3. 146
  4. 519
  5. 227
  6. 106
  7. 102
  8. 593
  9. 934
  10. 52
  11. 196
  12. 504
  13. 110
  14. 946
  15. 181
  16. 596
  17. 781
  18. 104
  19. 252
  20. 992
  21. 58
  22. 241
  23. 182
  24. 381
  25. 111
  26. 523
  27. 524
  28. 630
  29. 410
  30. 817
  31. 134
  32. 585
  33. 152
  34. 967
  35. 215
  36. 323
  37. 625
  38. 896
  39. 103
  40. 559

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