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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 233 · 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. 1.166 − 88 =
  2. 2.356 − 26 =
  3. 3.100 − 27 =
  4. 4.158 − 76 =
  5. 5.241 − 27 =
  6. 6.379 − 99 =
  7. 7.170 − 16 =
  8. 8.221 − 66 =
  9. 9.207 − 66 =
  10. 10.79 − 38 =
  11. 11.532 − 69 =
  12. 12.140 − 38 =
  13. 13.266 − 76 =
  14. 14.257 − 16 =
  15. 15.242 − 36 =
  16. 16.114 − 26 =
  17. 17.308 − 48 =
  18. 18.380 − 56 =
  19. 19.160 − 29 =
  20. 20.198 − 57 =
  21. 21.194 − 56 =
  22. 22.161 − 18 =
  23. 23.54 − 39 =
  24. 24.580 − 67 =
  25. 25.422 − 96 =
  26. 26.502 − 27 =
  27. 27.315 − 79 =
  28. 28.429 − 16 =
  29. 29.187 − 86 =
  30. 30.546 − 37 =
  31. 31.566 − 86 =
  32. 32.434 − 87 =
  33. 33.503 − 36 =
  34. 34.111 − 66 =
  35. 35.143 − 58 =
  36. 36.289 − 96 =
  37. 37.554 − 78 =
  38. 38.354 − 47 =
  39. 39.83 − 48 =
  40. 40.512 − 79 =

Answer key

  1. 78
  2. 330
  3. 73
  4. 82
  5. 214
  6. 280
  7. 154
  8. 155
  9. 141
  10. 41
  11. 463
  12. 102
  13. 190
  14. 241
  15. 206
  16. 88
  17. 260
  18. 324
  19. 131
  20. 141
  21. 138
  22. 143
  23. 15
  24. 513
  25. 326
  26. 475
  27. 236
  28. 413
  29. 101
  30. 509
  31. 480
  32. 347
  33. 467
  34. 45
  35. 85
  36. 193
  37. 476
  38. 307
  39. 35
  40. 433

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