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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 627 · 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. 1.437 − 98 =
  2. 2.436 − 99 =
  3. 3.261 − 57 =
  4. 4.534 − 79 =
  5. 5.503 − 47 =
  6. 6.332 − 58 =
  7. 7.157 − 78 =
  8. 8.506 − 99 =
  9. 9.142 − 26 =
  10. 10.228 − 78 =
  11. 11.410 − 48 =
  12. 12.535 − 47 =
  13. 13.330 − 86 =
  14. 14.305 − 46 =
  15. 15.177 − 18 =
  16. 16.549 − 29 =
  17. 17.232 − 19 =
  18. 18.168 − 87 =
  19. 19.70 − 36 =
  20. 20.429 − 89 =
  21. 21.148 − 97 =
  22. 22.151 − 37 =
  23. 23.577 − 47 =
  24. 24.524 − 88 =
  25. 25.414 − 49 =
  26. 26.263 − 96 =
  27. 27.364 − 56 =
  28. 28.365 − 39 =
  29. 29.560 − 66 =
  30. 30.149 − 39 =
  31. 31.533 − 38 =
  32. 32.223 − 77 =
  33. 33.404 − 89 =
  34. 34.503 − 18 =
  35. 35.355 − 57 =
  36. 36.220 − 69 =
  37. 37.144 − 86 =
  38. 38.266 − 99 =
  39. 39.294 − 16 =
  40. 40.157 − 68 =

Answer key

  1. 339
  2. 337
  3. 204
  4. 455
  5. 456
  6. 274
  7. 79
  8. 407
  9. 116
  10. 150
  11. 362
  12. 488
  13. 244
  14. 259
  15. 159
  16. 520
  17. 213
  18. 81
  19. 34
  20. 340
  21. 51
  22. 114
  23. 530
  24. 436
  25. 365
  26. 167
  27. 308
  28. 326
  29. 494
  30. 110
  31. 495
  32. 146
  33. 315
  34. 485
  35. 298
  36. 151
  37. 58
  38. 167
  39. 278
  40. 89

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