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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 32 · 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. 1.193 − 68 =
  2. 2.75 − 49 =
  3. 3.156 − 37 =
  4. 4.81 − 38 =
  5. 5.192 − 76 =
  6. 6.395 − 88 =
  7. 7.559 − 48 =
  8. 8.360 − 26 =
  9. 9.380 − 97 =
  10. 10.284 − 66 =
  11. 11.80 − 59 =
  12. 12.556 − 69 =
  13. 13.586 − 18 =
  14. 14.597 − 19 =
  15. 15.134 − 97 =
  16. 16.273 − 19 =
  17. 17.266 − 17 =
  18. 18.514 − 68 =
  19. 19.416 − 29 =
  20. 20.318 − 28 =
  21. 21.338 − 16 =
  22. 22.82 − 49 =
  23. 23.244 − 77 =
  24. 24.222 − 98 =
  25. 25.105 − 29 =
  26. 26.216 − 16 =
  27. 27.595 − 76 =
  28. 28.338 − 98 =
  29. 29.161 − 59 =
  30. 30.501 − 46 =
  31. 31.188 − 69 =
  32. 32.353 − 56 =
  33. 33.113 − 58 =
  34. 34.137 − 87 =
  35. 35.201 − 78 =
  36. 36.315 − 26 =
  37. 37.357 − 76 =
  38. 38.522 − 28 =
  39. 39.300 − 18 =
  40. 40.440 − 87 =

Answer key

  1. 125
  2. 26
  3. 119
  4. 43
  5. 116
  6. 307
  7. 511
  8. 334
  9. 283
  10. 218
  11. 21
  12. 487
  13. 568
  14. 578
  15. 37
  16. 254
  17. 249
  18. 446
  19. 387
  20. 290
  21. 322
  22. 33
  23. 167
  24. 124
  25. 76
  26. 200
  27. 519
  28. 240
  29. 102
  30. 455
  31. 119
  32. 297
  33. 55
  34. 50
  35. 123
  36. 289
  37. 281
  38. 494
  39. 282
  40. 353

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