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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 359 · 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.? − 126 = 141
  2. 2.505 − 458 =
  3. 3.A train has 542 people in the front coaches and 346 people in the back coaches. How many people are on the train?
  4. 4.408 − 404 =
  5. 5.237 − ? = 111
  6. 6.A school has 496 children. 350 of them are girls. How many boys are there?
  7. 7.? − 530 = 234
  8. 8.A school has 295 children. 116 of them are girls. How many boys are there?
  9. 9.A train has 230 people in the front coaches and 287 people in the back coaches. How many people are on the train?
  10. 10.? − 129 = 73
  11. 11.797 − 377 =
  12. 12.829 − ? = 300
  13. 13.A school has 503 children. 127 of them are girls. How many boys are there?
  14. 14.A school has 636 children. 454 of them are girls. How many boys are there?
  15. 15.? − 290 = 217
  16. 16.683 + 144 =
  17. 17.282 − 242 =
  18. 18.A train has 802 people in the front coaches and 189 people in the back coaches. How many people are on the train?
  19. 19.887 + 108 =
  20. 20.449 − 146 =
  21. 21.? + 760 = 924
  22. 22.384 − 164 =
  23. 23.? + 620 = 978
  24. 24.310 − 189 =
  25. 25.A train has 451 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  26. 26.511 − 490 =
  27. 27.A train has 535 people in the front coaches and 290 people in the back coaches. How many people are on the train?
  28. 28.A school has 310 children. 149 of them are girls. How many boys are there?
  29. 29.A school has 271 children. 248 of them are girls. How many boys are there?
  30. 30.? + 801 = 990
  31. 31.286 − ? = 172
  32. 32.941 − 936 =
  33. 33.234 − 178 =
  34. 34.633 + ? = 853
  35. 35.A school has 323 children. 234 of them are girls. How many boys are there?
  36. 36.A school has 410 children. 134 of them are girls. How many boys are there?
  37. 37.A school has 651 children. 246 of them are girls. How many boys are there?
  38. 38.A train has 243 people in the front coaches and 388 people in the back coaches. How many people are on the train?
  39. 39.A train has 533 people in the front coaches and 284 people in the back coaches. How many people are on the train?
  40. 40.? + 689 = 930

Answer key

  1. 267
  2. 47
  3. 888
  4. 4
  5. 126
  6. 146
  7. 764
  8. 179
  9. 517
  10. 202
  11. 420
  12. 529
  13. 376
  14. 182
  15. 507
  16. 827
  17. 40
  18. 991
  19. 995
  20. 303
  21. 164
  22. 220
  23. 358
  24. 121
  25. 786
  26. 21
  27. 825
  28. 161
  29. 23
  30. 189
  31. 114
  32. 5
  33. 56
  34. 220
  35. 89
  36. 276
  37. 405
  38. 631
  39. 817
  40. 241

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