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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 558 · 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. 1.115 − 86 =
  2. 2.595 − 49 =
  3. 3.127 − 69 =
  4. 4.466 − 98 =
  5. 5.101 − 68 =
  6. 6.202 − 46 =
  7. 7.186 − 26 =
  8. 8.186 − 66 =
  9. 9.576 − 79 =
  10. 10.463 − 98 =
  11. 11.186 − 66 =
  12. 12.438 − 27 =
  13. 13.335 − 97 =
  14. 14.517 − 66 =
  15. 15.152 − 89 =
  16. 16.289 − 27 =
  17. 17.103 − 17 =
  18. 18.105 − 89 =
  19. 19.165 − 76 =
  20. 20.342 − 36 =
  21. 21.443 − 37 =
  22. 22.224 − 86 =
  23. 23.335 − 39 =
  24. 24.203 − 97 =
  25. 25.599 − 29 =
  26. 26.592 − 88 =
  27. 27.274 − 56 =
  28. 28.71 − 68 =
  29. 29.459 − 56 =
  30. 30.155 − 59 =
  31. 31.111 − 79 =
  32. 32.124 − 19 =
  33. 33.597 − 88 =
  34. 34.369 − 77 =
  35. 35.137 − 98 =
  36. 36.241 − 37 =
  37. 37.343 − 19 =
  38. 38.591 − 57 =
  39. 39.106 − 77 =
  40. 40.484 − 26 =

Answer key

  1. 29
  2. 546
  3. 58
  4. 368
  5. 33
  6. 156
  7. 160
  8. 120
  9. 497
  10. 365
  11. 120
  12. 411
  13. 238
  14. 451
  15. 63
  16. 262
  17. 86
  18. 16
  19. 89
  20. 306
  21. 406
  22. 138
  23. 296
  24. 106
  25. 570
  26. 504
  27. 218
  28. 3
  29. 403
  30. 96
  31. 32
  32. 105
  33. 509
  34. 292
  35. 39
  36. 204
  37. 324
  38. 534
  39. 29
  40. 458

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