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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 404 · 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. 1.452 − 97 =
  2. 2.336 − 48 =
  3. 3.563 − 27 =
  4. 4.533 − 66 =
  5. 5.568 − 16 =
  6. 6.330 − 26 =
  7. 7.125 − 47 =
  8. 8.391 − 38 =
  9. 9.182 − 99 =
  10. 10.448 − 97 =
  11. 11.138 − 39 =
  12. 12.159 − 46 =
  13. 13.184 − 88 =
  14. 14.297 − 28 =
  15. 15.52 − 48 =
  16. 16.491 − 26 =
  17. 17.258 − 69 =
  18. 18.177 − 29 =
  19. 19.562 − 28 =
  20. 20.61 − 28 =
  21. 21.314 − 29 =
  22. 22.544 − 59 =
  23. 23.482 − 37 =
  24. 24.475 − 39 =
  25. 25.269 − 56 =
  26. 26.67 − 18 =
  27. 27.513 − 36 =
  28. 28.100 − 59 =
  29. 29.444 − 68 =
  30. 30.161 − 38 =
  31. 31.166 − 98 =
  32. 32.575 − 28 =
  33. 33.580 − 47 =
  34. 34.63 − 17 =
  35. 35.99 − 16 =
  36. 36.300 − 69 =
  37. 37.59 − 46 =
  38. 38.119 − 46 =
  39. 39.562 − 87 =
  40. 40.59 − 16 =

Answer key

  1. 355
  2. 288
  3. 536
  4. 467
  5. 552
  6. 304
  7. 78
  8. 353
  9. 83
  10. 351
  11. 99
  12. 113
  13. 96
  14. 269
  15. 4
  16. 465
  17. 189
  18. 148
  19. 534
  20. 33
  21. 285
  22. 485
  23. 445
  24. 436
  25. 213
  26. 49
  27. 477
  28. 41
  29. 376
  30. 123
  31. 68
  32. 547
  33. 533
  34. 46
  35. 83
  36. 231
  37. 13
  38. 73
  39. 475
  40. 43

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