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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 489 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.212 − 27 =
  2. 2.172 − 39 =
  3. 3.331 − 36 =
  4. 4.227 − 27 =
  5. 5.197 − 98 =
  6. 6.376 − 37 =
  7. 7.207 − 47 =
  8. 8.165 − 39 =
  9. 9.491 − 49 =
  10. 10.318 − 57 =
  11. 11.68 − 38 =
  12. 12.63 − 26 =
  13. 13.111 − 89 =
  14. 14.103 − 66 =
  15. 15.192 − 77 =
  16. 16.140 − 29 =
  17. 17.192 − 49 =
  18. 18.423 − 36 =
  19. 19.242 − 17 =
  20. 20.317 − 69 =
  21. 21.551 − 27 =
  22. 22.400 − 88 =
  23. 23.462 − 48 =
  24. 24.263 − 28 =
  25. 25.169 − 86 =
  26. 26.349 − 89 =
  27. 27.190 − 58 =
  28. 28.246 − 97 =
  29. 29.335 − 59 =
  30. 30.507 − 88 =
  31. 31.438 − 57 =
  32. 32.148 − 66 =
  33. 33.534 − 29 =
  34. 34.154 − 16 =
  35. 35.238 − 26 =
  36. 36.469 − 19 =
  37. 37.404 − 28 =
  38. 38.411 − 88 =
  39. 39.553 − 69 =
  40. 40.448 − 99 =

Answer key

  1. 185
  2. 133
  3. 295
  4. 200
  5. 99
  6. 339
  7. 160
  8. 126
  9. 442
  10. 261
  11. 30
  12. 37
  13. 22
  14. 37
  15. 115
  16. 111
  17. 143
  18. 387
  19. 225
  20. 248
  21. 524
  22. 312
  23. 414
  24. 235
  25. 83
  26. 260
  27. 132
  28. 149
  29. 276
  30. 419
  31. 381
  32. 82
  33. 505
  34. 138
  35. 212
  36. 450
  37. 376
  38. 323
  39. 484
  40. 349

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