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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 134 · 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. 1.167 − 38 =
  2. 2.275 − 99 =
  3. 3.397 − 29 =
  4. 4.520 − 57 =
  5. 5.125 − 19 =
  6. 6.275 − 59 =
  7. 7.556 − 76 =
  8. 8.595 − 27 =
  9. 9.149 − 37 =
  10. 10.339 − 76 =
  11. 11.468 − 37 =
  12. 12.495 − 69 =
  13. 13.308 − 97 =
  14. 14.165 − 29 =
  15. 15.200 − 87 =
  16. 16.428 − 19 =
  17. 17.156 − 79 =
  18. 18.165 − 69 =
  19. 19.465 − 39 =
  20. 20.267 − 78 =
  21. 21.250 − 99 =
  22. 22.562 − 58 =
  23. 23.533 − 37 =
  24. 24.392 − 77 =
  25. 25.390 − 57 =
  26. 26.485 − 49 =
  27. 27.136 − 16 =
  28. 28.362 − 27 =
  29. 29.447 − 28 =
  30. 30.553 − 68 =
  31. 31.432 − 66 =
  32. 32.65 − 17 =
  33. 33.122 − 87 =
  34. 34.155 − 86 =
  35. 35.412 − 27 =
  36. 36.135 − 89 =
  37. 37.198 − 97 =
  38. 38.145 − 77 =
  39. 39.259 − 36 =
  40. 40.138 − 29 =

Answer key

  1. 129
  2. 176
  3. 368
  4. 463
  5. 106
  6. 216
  7. 480
  8. 568
  9. 112
  10. 263
  11. 431
  12. 426
  13. 211
  14. 136
  15. 113
  16. 409
  17. 77
  18. 96
  19. 426
  20. 189
  21. 151
  22. 504
  23. 496
  24. 315
  25. 333
  26. 436
  27. 120
  28. 335
  29. 419
  30. 485
  31. 366
  32. 48
  33. 35
  34. 69
  35. 385
  36. 46
  37. 101
  38. 68
  39. 223
  40. 109

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