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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 414 · 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. 1.446 − 26 =
  2. 2.589 − 39 =
  3. 3.524 − 69 =
  4. 4.504 − 96 =
  5. 5.585 − 16 =
  6. 6.414 − 66 =
  7. 7.533 − 59 =
  8. 8.423 − 26 =
  9. 9.334 − 96 =
  10. 10.225 − 19 =
  11. 11.354 − 76 =
  12. 12.224 − 89 =
  13. 13.515 − 46 =
  14. 14.158 − 98 =
  15. 15.103 − 49 =
  16. 16.430 − 96 =
  17. 17.363 − 96 =
  18. 18.57 − 16 =
  19. 19.110 − 86 =
  20. 20.299 − 48 =
  21. 21.192 − 99 =
  22. 22.158 − 77 =
  23. 23.69 − 58 =
  24. 24.283 − 17 =
  25. 25.152 − 77 =
  26. 26.232 − 37 =
  27. 27.146 − 29 =
  28. 28.225 − 26 =
  29. 29.522 − 16 =
  30. 30.231 − 58 =
  31. 31.171 − 57 =
  32. 32.233 − 89 =
  33. 33.220 − 78 =
  34. 34.429 − 67 =
  35. 35.533 − 68 =
  36. 36.537 − 78 =
  37. 37.553 − 67 =
  38. 38.59 − 17 =
  39. 39.73 − 18 =
  40. 40.363 − 46 =

Answer key

  1. 420
  2. 550
  3. 455
  4. 408
  5. 569
  6. 348
  7. 474
  8. 397
  9. 238
  10. 206
  11. 278
  12. 135
  13. 469
  14. 60
  15. 54
  16. 334
  17. 267
  18. 41
  19. 24
  20. 251
  21. 93
  22. 81
  23. 11
  24. 266
  25. 75
  26. 195
  27. 117
  28. 199
  29. 506
  30. 173
  31. 114
  32. 144
  33. 142
  34. 362
  35. 465
  36. 459
  37. 486
  38. 42
  39. 55
  40. 317

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