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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 579 · 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. 1.524 − 76 =
  2. 2.134 − 29 =
  3. 3.350 − 38 =
  4. 4.575 − 57 =
  5. 5.416 − 67 =
  6. 6.521 − 29 =
  7. 7.132 − 59 =
  8. 8.453 − 96 =
  9. 9.462 − 66 =
  10. 10.216 − 26 =
  11. 11.538 − 48 =
  12. 12.563 − 98 =
  13. 13.572 − 98 =
  14. 14.303 − 16 =
  15. 15.103 − 98 =
  16. 16.454 − 47 =
  17. 17.155 − 97 =
  18. 18.175 − 86 =
  19. 19.102 − 69 =
  20. 20.97 − 68 =
  21. 21.585 − 86 =
  22. 22.169 − 67 =
  23. 23.217 − 49 =
  24. 24.209 − 16 =
  25. 25.573 − 67 =
  26. 26.64 − 37 =
  27. 27.262 − 47 =
  28. 28.362 − 97 =
  29. 29.382 − 86 =
  30. 30.120 − 96 =
  31. 31.142 − 37 =
  32. 32.190 − 29 =
  33. 33.80 − 27 =
  34. 34.357 − 89 =
  35. 35.349 − 97 =
  36. 36.416 − 67 =
  37. 37.467 − 66 =
  38. 38.315 − 19 =
  39. 39.301 − 87 =
  40. 40.564 − 66 =

Answer key

  1. 448
  2. 105
  3. 312
  4. 518
  5. 349
  6. 492
  7. 73
  8. 357
  9. 396
  10. 190
  11. 490
  12. 465
  13. 474
  14. 287
  15. 5
  16. 407
  17. 58
  18. 89
  19. 33
  20. 29
  21. 499
  22. 102
  23. 168
  24. 193
  25. 506
  26. 27
  27. 215
  28. 265
  29. 296
  30. 24
  31. 105
  32. 161
  33. 53
  34. 268
  35. 252
  36. 349
  37. 401
  38. 296
  39. 214
  40. 498

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