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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 738 · 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. 1.365 − 26 =
  2. 2.271 − 29 =
  3. 3.82 − 27 =
  4. 4.221 − 79 =
  5. 5.231 − 59 =
  6. 6.252 − 78 =
  7. 7.78 − 28 =
  8. 8.509 − 16 =
  9. 9.515 − 28 =
  10. 10.222 − 49 =
  11. 11.356 − 48 =
  12. 12.174 − 86 =
  13. 13.590 − 19 =
  14. 14.167 − 78 =
  15. 15.184 − 66 =
  16. 16.300 − 86 =
  17. 17.258 − 76 =
  18. 18.263 − 69 =
  19. 19.572 − 86 =
  20. 20.468 − 68 =
  21. 21.78 − 17 =
  22. 22.438 − 76 =
  23. 23.154 − 89 =
  24. 24.294 − 89 =
  25. 25.481 − 86 =
  26. 26.590 − 59 =
  27. 27.231 − 26 =
  28. 28.166 − 29 =
  29. 29.438 − 16 =
  30. 30.303 − 38 =
  31. 31.499 − 66 =
  32. 32.144 − 17 =
  33. 33.121 − 17 =
  34. 34.353 − 36 =
  35. 35.512 − 96 =
  36. 36.293 − 89 =
  37. 37.360 − 57 =
  38. 38.408 − 36 =
  39. 39.422 − 96 =
  40. 40.598 − 18 =

Answer key

  1. 339
  2. 242
  3. 55
  4. 142
  5. 172
  6. 174
  7. 50
  8. 493
  9. 487
  10. 173
  11. 308
  12. 88
  13. 571
  14. 89
  15. 118
  16. 214
  17. 182
  18. 194
  19. 486
  20. 400
  21. 61
  22. 362
  23. 65
  24. 205
  25. 395
  26. 531
  27. 205
  28. 137
  29. 422
  30. 265
  31. 433
  32. 127
  33. 104
  34. 317
  35. 416
  36. 204
  37. 303
  38. 372
  39. 326
  40. 580

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