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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 455 · 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. 1.305 − 96 =
  2. 2.140 − 49 =
  3. 3.170 − 96 =
  4. 4.66 − 29 =
  5. 5.274 − 59 =
  6. 6.595 − 68 =
  7. 7.197 − 67 =
  8. 8.436 − 99 =
  9. 9.554 − 37 =
  10. 10.71 − 56 =
  11. 11.229 − 97 =
  12. 12.85 − 58 =
  13. 13.349 − 17 =
  14. 14.367 − 59 =
  15. 15.390 − 39 =
  16. 16.174 − 66 =
  17. 17.513 − 59 =
  18. 18.485 − 99 =
  19. 19.423 − 39 =
  20. 20.269 − 79 =
  21. 21.349 − 99 =
  22. 22.206 − 57 =
  23. 23.302 − 86 =
  24. 24.364 − 47 =
  25. 25.173 − 78 =
  26. 26.171 − 18 =
  27. 27.325 − 57 =
  28. 28.174 − 78 =
  29. 29.445 − 58 =
  30. 30.55 − 26 =
  31. 31.417 − 56 =
  32. 32.507 − 59 =
  33. 33.271 − 79 =
  34. 34.126 − 36 =
  35. 35.159 − 46 =
  36. 36.241 − 89 =
  37. 37.79 − 58 =
  38. 38.297 − 38 =
  39. 39.208 − 97 =
  40. 40.251 − 28 =

Answer key

  1. 209
  2. 91
  3. 74
  4. 37
  5. 215
  6. 527
  7. 130
  8. 337
  9. 517
  10. 15
  11. 132
  12. 27
  13. 332
  14. 308
  15. 351
  16. 108
  17. 454
  18. 386
  19. 384
  20. 190
  21. 250
  22. 149
  23. 216
  24. 317
  25. 95
  26. 153
  27. 268
  28. 96
  29. 387
  30. 29
  31. 361
  32. 448
  33. 192
  34. 90
  35. 113
  36. 152
  37. 21
  38. 259
  39. 111
  40. 223

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