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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 144 · 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. 1.274 − 18 =
  2. 2.112 − 36 =
  3. 3.582 − 19 =
  4. 4.485 − 79 =
  5. 5.89 − 26 =
  6. 6.214 − 47 =
  7. 7.383 − 17 =
  8. 8.198 − 97 =
  9. 9.524 − 76 =
  10. 10.109 − 96 =
  11. 11.303 − 68 =
  12. 12.186 − 47 =
  13. 13.208 − 49 =
  14. 14.60 − 29 =
  15. 15.427 − 66 =
  16. 16.168 − 39 =
  17. 17.289 − 37 =
  18. 18.221 − 28 =
  19. 19.416 − 58 =
  20. 20.271 − 27 =
  21. 21.579 − 77 =
  22. 22.139 − 57 =
  23. 23.251 − 97 =
  24. 24.322 − 69 =
  25. 25.88 − 59 =
  26. 26.174 − 66 =
  27. 27.410 − 28 =
  28. 28.348 − 98 =
  29. 29.452 − 88 =
  30. 30.59 − 58 =
  31. 31.372 − 68 =
  32. 32.151 − 48 =
  33. 33.196 − 38 =
  34. 34.468 − 67 =
  35. 35.567 − 16 =
  36. 36.156 − 29 =
  37. 37.97 − 68 =
  38. 38.503 − 77 =
  39. 39.129 − 18 =
  40. 40.98 − 29 =

Answer key

  1. 256
  2. 76
  3. 563
  4. 406
  5. 63
  6. 167
  7. 366
  8. 101
  9. 448
  10. 13
  11. 235
  12. 139
  13. 159
  14. 31
  15. 361
  16. 129
  17. 252
  18. 193
  19. 358
  20. 244
  21. 502
  22. 82
  23. 154
  24. 253
  25. 29
  26. 108
  27. 382
  28. 250
  29. 364
  30. 1
  31. 304
  32. 103
  33. 158
  34. 401
  35. 551
  36. 127
  37. 29
  38. 426
  39. 111
  40. 69

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