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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 567 · 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. 1.174 − 99 =
  2. 2.592 − 39 =
  3. 3.166 − 96 =
  4. 4.184 − 98 =
  5. 5.484 − 28 =
  6. 6.163 − 18 =
  7. 7.148 − 27 =
  8. 8.558 − 46 =
  9. 9.133 − 39 =
  10. 10.388 − 69 =
  11. 11.76 − 69 =
  12. 12.517 − 48 =
  13. 13.351 − 78 =
  14. 14.259 − 77 =
  15. 15.224 − 87 =
  16. 16.101 − 17 =
  17. 17.546 − 29 =
  18. 18.263 − 66 =
  19. 19.213 − 97 =
  20. 20.542 − 79 =
  21. 21.58 − 57 =
  22. 22.184 − 26 =
  23. 23.267 − 47 =
  24. 24.92 − 77 =
  25. 25.501 − 68 =
  26. 26.124 − 96 =
  27. 27.566 − 57 =
  28. 28.336 − 27 =
  29. 29.113 − 18 =
  30. 30.549 − 57 =
  31. 31.434 − 59 =
  32. 32.456 − 76 =
  33. 33.177 − 26 =
  34. 34.116 − 18 =
  35. 35.133 − 96 =
  36. 36.467 − 36 =
  37. 37.288 − 76 =
  38. 38.360 − 69 =
  39. 39.483 − 69 =
  40. 40.582 − 46 =

Answer key

  1. 75
  2. 553
  3. 70
  4. 86
  5. 456
  6. 145
  7. 121
  8. 512
  9. 94
  10. 319
  11. 7
  12. 469
  13. 273
  14. 182
  15. 137
  16. 84
  17. 517
  18. 197
  19. 116
  20. 463
  21. 1
  22. 158
  23. 220
  24. 15
  25. 433
  26. 28
  27. 509
  28. 309
  29. 95
  30. 492
  31. 375
  32. 380
  33. 151
  34. 98
  35. 37
  36. 431
  37. 212
  38. 291
  39. 414
  40. 536

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