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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 861 · 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. 1.162 − 78 =
  2. 2.355 − 18 =
  3. 3.209 − 47 =
  4. 4.460 − 96 =
  5. 5.375 − 39 =
  6. 6.138 − 26 =
  7. 7.211 − 59 =
  8. 8.422 − 89 =
  9. 9.423 − 57 =
  10. 10.396 − 36 =
  11. 11.134 − 16 =
  12. 12.514 − 89 =
  13. 13.579 − 79 =
  14. 14.122 − 76 =
  15. 15.100 − 56 =
  16. 16.575 − 39 =
  17. 17.214 − 19 =
  18. 18.584 − 17 =
  19. 19.247 − 39 =
  20. 20.589 − 58 =
  21. 21.199 − 37 =
  22. 22.155 − 66 =
  23. 23.174 − 38 =
  24. 24.63 − 56 =
  25. 25.54 − 39 =
  26. 26.497 − 16 =
  27. 27.135 − 97 =
  28. 28.268 − 88 =
  29. 29.363 − 49 =
  30. 30.560 − 38 =
  31. 31.164 − 17 =
  32. 32.470 − 97 =
  33. 33.89 − 67 =
  34. 34.132 − 36 =
  35. 35.201 − 18 =
  36. 36.59 − 38 =
  37. 37.186 − 86 =
  38. 38.530 − 19 =
  39. 39.370 − 47 =
  40. 40.579 − 96 =

Answer key

  1. 84
  2. 337
  3. 162
  4. 364
  5. 336
  6. 112
  7. 152
  8. 333
  9. 366
  10. 360
  11. 118
  12. 425
  13. 500
  14. 46
  15. 44
  16. 536
  17. 195
  18. 567
  19. 208
  20. 531
  21. 162
  22. 89
  23. 136
  24. 7
  25. 15
  26. 481
  27. 38
  28. 180
  29. 314
  30. 522
  31. 147
  32. 373
  33. 22
  34. 96
  35. 183
  36. 21
  37. 100
  38. 511
  39. 323
  40. 483

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