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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 657 · 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. 1.564 − 161 =
  2. 2.676 + 275 =
  3. 3.763 − ? = 26
  4. 4.838 + 139 =
  5. 5.412 − ? = 207
  6. 6.480 − 193 =
  7. 7.? − 130 = 330
  8. 8.648 + 241 =
  9. 9.120 + 437 =
  10. 10.? − 359 = 470
  11. 11.559 − ? = 228
  12. 12.324 + 167 =
  13. 13.A train has 285 people in the front coaches and 261 people in the back coaches. How many people are on the train?
  14. 14.503 + 349 =
  15. 15.A school has 677 children. 473 of them are girls. How many boys are there?
  16. 16.222 − 169 =
  17. 17.816 − ? = 247
  18. 18.359 − 121 =
  19. 19.A school has 489 children. 466 of them are girls. How many boys are there?
  20. 20.A train has 844 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  21. 21.546 + 404 =
  22. 22.A train has 383 people in the front coaches and 364 people in the back coaches. How many people are on the train?
  23. 23.423 + ? = 771
  24. 24.A school has 557 children. 129 of them are girls. How many boys are there?
  25. 25.833 + 107 =
  26. 26.567 + 401 =
  27. 27.748 + 173 =
  28. 28.688 + ? = 922
  29. 29.A train has 234 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  30. 30.787 + 109 =
  31. 31.A school has 881 children. 823 of them are girls. How many boys are there?
  32. 32.A school has 943 children. 524 of them are girls. How many boys are there?
  33. 33.555 − 274 =
  34. 34.759 − ? = 549
  35. 35.765 − 324 =
  36. 36.283 − ? = 29
  37. 37.597 − ? = 456
  38. 38.A train has 249 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  39. 39.324 + ? = 443
  40. 40.A train has 402 people in the front coaches and 317 people in the back coaches. How many people are on the train?

Answer key

  1. 403
  2. 951
  3. 737
  4. 977
  5. 205
  6. 287
  7. 460
  8. 889
  9. 557
  10. 829
  11. 331
  12. 491
  13. 546
  14. 852
  15. 204
  16. 53
  17. 569
  18. 238
  19. 23
  20. 977
  21. 950
  22. 747
  23. 348
  24. 428
  25. 940
  26. 968
  27. 921
  28. 234
  29. 336
  30. 896
  31. 58
  32. 419
  33. 281
  34. 210
  35. 441
  36. 254
  37. 141
  38. 411
  39. 119
  40. 719

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