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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 986 · 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. 1.164 − 76 =
  2. 2.386 − 36 =
  3. 3.549 − 47 =
  4. 4.459 − 66 =
  5. 5.386 − 99 =
  6. 6.260 − 96 =
  7. 7.514 − 67 =
  8. 8.440 − 49 =
  9. 9.262 − 96 =
  10. 10.425 − 36 =
  11. 11.393 − 16 =
  12. 12.127 − 79 =
  13. 13.473 − 18 =
  14. 14.59 − 58 =
  15. 15.202 − 47 =
  16. 16.194 − 58 =
  17. 17.163 − 67 =
  18. 18.155 − 26 =
  19. 19.115 − 86 =
  20. 20.568 − 28 =
  21. 21.80 − 36 =
  22. 22.320 − 89 =
  23. 23.263 − 16 =
  24. 24.542 − 97 =
  25. 25.358 − 27 =
  26. 26.591 − 38 =
  27. 27.123 − 47 =
  28. 28.92 − 68 =
  29. 29.584 − 46 =
  30. 30.170 − 89 =
  31. 31.447 − 69 =
  32. 32.491 − 36 =
  33. 33.212 − 86 =
  34. 34.556 − 97 =
  35. 35.313 − 49 =
  36. 36.148 − 97 =
  37. 37.114 − 67 =
  38. 38.374 − 17 =
  39. 39.463 − 99 =
  40. 40.182 − 99 =

Answer key

  1. 88
  2. 350
  3. 502
  4. 393
  5. 287
  6. 164
  7. 447
  8. 391
  9. 166
  10. 389
  11. 377
  12. 48
  13. 455
  14. 1
  15. 155
  16. 136
  17. 96
  18. 129
  19. 29
  20. 540
  21. 44
  22. 231
  23. 247
  24. 445
  25. 331
  26. 553
  27. 76
  28. 24
  29. 538
  30. 81
  31. 378
  32. 455
  33. 126
  34. 459
  35. 264
  36. 51
  37. 47
  38. 357
  39. 364
  40. 83

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