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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 961 · 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. 1.184 − 27 =
  2. 2.396 − 49 =
  3. 3.503 − 57 =
  4. 4.193 − 18 =
  5. 5.54 − 47 =
  6. 6.241 − 37 =
  7. 7.419 − 28 =
  8. 8.207 − 98 =
  9. 9.590 − 96 =
  10. 10.591 − 16 =
  11. 11.441 − 48 =
  12. 12.164 − 48 =
  13. 13.158 − 47 =
  14. 14.400 − 58 =
  15. 15.412 − 58 =
  16. 16.336 − 59 =
  17. 17.245 − 26 =
  18. 18.268 − 98 =
  19. 19.71 − 66 =
  20. 20.535 − 86 =
  21. 21.289 − 29 =
  22. 22.153 − 76 =
  23. 23.148 − 79 =
  24. 24.243 − 38 =
  25. 25.147 − 36 =
  26. 26.141 − 96 =
  27. 27.485 − 38 =
  28. 28.360 − 46 =
  29. 29.255 − 36 =
  30. 30.529 − 29 =
  31. 31.491 − 39 =
  32. 32.444 − 47 =
  33. 33.132 − 86 =
  34. 34.512 − 86 =
  35. 35.312 − 87 =
  36. 36.227 − 89 =
  37. 37.360 − 36 =
  38. 38.429 − 79 =
  39. 39.177 − 99 =
  40. 40.137 − 86 =

Answer key

  1. 157
  2. 347
  3. 446
  4. 175
  5. 7
  6. 204
  7. 391
  8. 109
  9. 494
  10. 575
  11. 393
  12. 116
  13. 111
  14. 342
  15. 354
  16. 277
  17. 219
  18. 170
  19. 5
  20. 449
  21. 260
  22. 77
  23. 69
  24. 205
  25. 111
  26. 45
  27. 447
  28. 314
  29. 219
  30. 500
  31. 452
  32. 397
  33. 46
  34. 426
  35. 225
  36. 138
  37. 324
  38. 350
  39. 78
  40. 51

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