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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 246 · 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. 1.210 − 37 =
  2. 2.533 − 66 =
  3. 3.166 − 77 =
  4. 4.328 − 69 =
  5. 5.160 − 69 =
  6. 6.412 − 48 =
  7. 7.478 − 17 =
  8. 8.207 − 36 =
  9. 9.197 − 38 =
  10. 10.443 − 67 =
  11. 11.101 − 67 =
  12. 12.449 − 29 =
  13. 13.551 − 56 =
  14. 14.162 − 59 =
  15. 15.469 − 56 =
  16. 16.596 − 26 =
  17. 17.191 − 79 =
  18. 18.139 − 17 =
  19. 19.430 − 57 =
  20. 20.364 − 17 =
  21. 21.573 − 67 =
  22. 22.157 − 86 =
  23. 23.225 − 77 =
  24. 24.472 − 89 =
  25. 25.224 − 77 =
  26. 26.589 − 26 =
  27. 27.210 − 39 =
  28. 28.252 − 78 =
  29. 29.409 − 39 =
  30. 30.74 − 26 =
  31. 31.344 − 98 =
  32. 32.158 − 68 =
  33. 33.172 − 87 =
  34. 34.114 − 57 =
  35. 35.413 − 38 =
  36. 36.427 − 88 =
  37. 37.541 − 56 =
  38. 38.585 − 16 =
  39. 39.131 − 96 =
  40. 40.311 − 48 =

Answer key

  1. 173
  2. 467
  3. 89
  4. 259
  5. 91
  6. 364
  7. 461
  8. 171
  9. 159
  10. 376
  11. 34
  12. 420
  13. 495
  14. 103
  15. 413
  16. 570
  17. 112
  18. 122
  19. 373
  20. 347
  21. 506
  22. 71
  23. 148
  24. 383
  25. 147
  26. 563
  27. 171
  28. 174
  29. 370
  30. 48
  31. 246
  32. 90
  33. 85
  34. 57
  35. 375
  36. 339
  37. 485
  38. 569
  39. 35
  40. 263

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