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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 858 · 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. 1.226 − 68 =
  2. 2.80 − 48 =
  3. 3.518 − 76 =
  4. 4.425 − 38 =
  5. 5.398 − 66 =
  6. 6.359 − 16 =
  7. 7.202 − 89 =
  8. 8.58 − 19 =
  9. 9.86 − 48 =
  10. 10.523 − 18 =
  11. 11.283 − 99 =
  12. 12.530 − 36 =
  13. 13.168 − 78 =
  14. 14.177 − 86 =
  15. 15.163 − 79 =
  16. 16.413 − 68 =
  17. 17.503 − 78 =
  18. 18.296 − 38 =
  19. 19.320 − 16 =
  20. 20.480 − 58 =
  21. 21.389 − 46 =
  22. 22.472 − 39 =
  23. 23.127 − 66 =
  24. 24.154 − 18 =
  25. 25.124 − 68 =
  26. 26.160 − 68 =
  27. 27.222 − 77 =
  28. 28.379 − 59 =
  29. 29.101 − 96 =
  30. 30.166 − 97 =
  31. 31.371 − 38 =
  32. 32.583 − 69 =
  33. 33.326 − 29 =
  34. 34.432 − 26 =
  35. 35.129 − 56 =
  36. 36.287 − 36 =
  37. 37.558 − 56 =
  38. 38.569 − 87 =
  39. 39.324 − 47 =
  40. 40.300 − 17 =

Answer key

  1. 158
  2. 32
  3. 442
  4. 387
  5. 332
  6. 343
  7. 113
  8. 39
  9. 38
  10. 505
  11. 184
  12. 494
  13. 90
  14. 91
  15. 84
  16. 345
  17. 425
  18. 258
  19. 304
  20. 422
  21. 343
  22. 433
  23. 61
  24. 136
  25. 56
  26. 92
  27. 145
  28. 320
  29. 5
  30. 69
  31. 333
  32. 514
  33. 297
  34. 406
  35. 73
  36. 251
  37. 502
  38. 482
  39. 277
  40. 283

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