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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 475 · 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. 1.487 − 56 =
  2. 2.383 − 88 =
  3. 3.138 − 79 =
  4. 4.160 − 48 =
  5. 5.441 − 57 =
  6. 6.390 − 48 =
  7. 7.173 − 86 =
  8. 8.155 − 26 =
  9. 9.277 − 29 =
  10. 10.499 − 46 =
  11. 11.443 − 68 =
  12. 12.185 − 57 =
  13. 13.187 − 58 =
  14. 14.167 − 27 =
  15. 15.562 − 29 =
  16. 16.67 − 38 =
  17. 17.213 − 46 =
  18. 18.130 − 69 =
  19. 19.446 − 17 =
  20. 20.157 − 17 =
  21. 21.114 − 38 =
  22. 22.151 − 67 =
  23. 23.243 − 69 =
  24. 24.160 − 76 =
  25. 25.412 − 96 =
  26. 26.213 − 77 =
  27. 27.546 − 88 =
  28. 28.158 − 76 =
  29. 29.549 − 87 =
  30. 30.434 − 68 =
  31. 31.117 − 99 =
  32. 32.556 − 38 =
  33. 33.66 − 17 =
  34. 34.302 − 76 =
  35. 35.411 − 77 =
  36. 36.324 − 48 =
  37. 37.524 − 68 =
  38. 38.469 − 99 =
  39. 39.267 − 78 =
  40. 40.437 − 68 =

Answer key

  1. 431
  2. 295
  3. 59
  4. 112
  5. 384
  6. 342
  7. 87
  8. 129
  9. 248
  10. 453
  11. 375
  12. 128
  13. 129
  14. 140
  15. 533
  16. 29
  17. 167
  18. 61
  19. 429
  20. 140
  21. 76
  22. 84
  23. 174
  24. 84
  25. 316
  26. 136
  27. 458
  28. 82
  29. 462
  30. 366
  31. 18
  32. 518
  33. 49
  34. 226
  35. 334
  36. 276
  37. 456
  38. 370
  39. 189
  40. 369

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