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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 805 · 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. 1.193 − 26 =
  2. 2.229 − 19 =
  3. 3.473 − 66 =
  4. 4.471 − 46 =
  5. 5.289 − 28 =
  6. 6.492 − 39 =
  7. 7.157 − 59 =
  8. 8.574 − 16 =
  9. 9.119 − 79 =
  10. 10.413 − 26 =
  11. 11.266 − 29 =
  12. 12.72 − 28 =
  13. 13.459 − 87 =
  14. 14.96 − 59 =
  15. 15.469 − 19 =
  16. 16.453 − 96 =
  17. 17.479 − 67 =
  18. 18.569 − 68 =
  19. 19.481 − 16 =
  20. 20.187 − 99 =
  21. 21.542 − 59 =
  22. 22.575 − 66 =
  23. 23.294 − 26 =
  24. 24.472 − 36 =
  25. 25.167 − 29 =
  26. 26.452 − 47 =
  27. 27.232 − 28 =
  28. 28.364 − 78 =
  29. 29.203 − 27 =
  30. 30.244 − 37 =
  31. 31.414 − 69 =
  32. 32.390 − 99 =
  33. 33.435 − 16 =
  34. 34.196 − 87 =
  35. 35.416 − 68 =
  36. 36.508 − 86 =
  37. 37.425 − 57 =
  38. 38.529 − 76 =
  39. 39.159 − 77 =
  40. 40.474 − 58 =

Answer key

  1. 167
  2. 210
  3. 407
  4. 425
  5. 261
  6. 453
  7. 98
  8. 558
  9. 40
  10. 387
  11. 237
  12. 44
  13. 372
  14. 37
  15. 450
  16. 357
  17. 412
  18. 501
  19. 465
  20. 88
  21. 483
  22. 509
  23. 268
  24. 436
  25. 138
  26. 405
  27. 204
  28. 286
  29. 176
  30. 207
  31. 345
  32. 291
  33. 419
  34. 109
  35. 348
  36. 422
  37. 368
  38. 453
  39. 82
  40. 416

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