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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 725 · 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. 1.243 − 36 =
  2. 2.528 − 86 =
  3. 3.101 − 27 =
  4. 4.195 − 89 =
  5. 5.520 − 47 =
  6. 6.328 − 88 =
  7. 7.512 − 19 =
  8. 8.181 − 38 =
  9. 9.197 − 56 =
  10. 10.533 − 16 =
  11. 11.151 − 59 =
  12. 12.567 − 28 =
  13. 13.109 − 37 =
  14. 14.199 − 57 =
  15. 15.187 − 97 =
  16. 16.99 − 17 =
  17. 17.347 − 97 =
  18. 18.519 − 86 =
  19. 19.536 − 87 =
  20. 20.77 − 67 =
  21. 21.282 − 67 =
  22. 22.204 − 17 =
  23. 23.184 − 27 =
  24. 24.415 − 88 =
  25. 25.303 − 36 =
  26. 26.170 − 57 =
  27. 27.181 − 58 =
  28. 28.142 − 28 =
  29. 29.132 − 49 =
  30. 30.460 − 19 =
  31. 31.97 − 28 =
  32. 32.432 − 37 =
  33. 33.481 − 98 =
  34. 34.117 − 37 =
  35. 35.208 − 47 =
  36. 36.148 − 87 =
  37. 37.360 − 68 =
  38. 38.247 − 59 =
  39. 39.396 − 26 =
  40. 40.496 − 77 =

Answer key

  1. 207
  2. 442
  3. 74
  4. 106
  5. 473
  6. 240
  7. 493
  8. 143
  9. 141
  10. 517
  11. 92
  12. 539
  13. 72
  14. 142
  15. 90
  16. 82
  17. 250
  18. 433
  19. 449
  20. 10
  21. 215
  22. 187
  23. 157
  24. 327
  25. 267
  26. 113
  27. 123
  28. 114
  29. 83
  30. 441
  31. 69
  32. 395
  33. 383
  34. 80
  35. 161
  36. 61
  37. 292
  38. 188
  39. 370
  40. 419

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