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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 891 · 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. 1.108 − 76 =
  2. 2.220 − 16 =
  3. 3.538 − 37 =
  4. 4.66 − 58 =
  5. 5.548 − 97 =
  6. 6.362 − 36 =
  7. 7.568 − 79 =
  8. 8.165 − 68 =
  9. 9.577 − 59 =
  10. 10.217 − 96 =
  11. 11.167 − 56 =
  12. 12.397 − 19 =
  13. 13.162 − 77 =
  14. 14.203 − 46 =
  15. 15.391 − 26 =
  16. 16.545 − 99 =
  17. 17.105 − 87 =
  18. 18.129 − 67 =
  19. 19.595 − 89 =
  20. 20.232 − 46 =
  21. 21.454 − 29 =
  22. 22.58 − 38 =
  23. 23.280 − 69 =
  24. 24.462 − 27 =
  25. 25.168 − 26 =
  26. 26.488 − 99 =
  27. 27.219 − 77 =
  28. 28.373 − 59 =
  29. 29.371 − 57 =
  30. 30.141 − 98 =
  31. 31.340 − 57 =
  32. 32.552 − 59 =
  33. 33.171 − 87 =
  34. 34.308 − 46 =
  35. 35.454 − 19 =
  36. 36.354 − 96 =
  37. 37.228 − 47 =
  38. 38.275 − 28 =
  39. 39.597 − 46 =
  40. 40.179 − 16 =

Answer key

  1. 32
  2. 204
  3. 501
  4. 8
  5. 451
  6. 326
  7. 489
  8. 97
  9. 518
  10. 121
  11. 111
  12. 378
  13. 85
  14. 157
  15. 365
  16. 446
  17. 18
  18. 62
  19. 506
  20. 186
  21. 425
  22. 20
  23. 211
  24. 435
  25. 142
  26. 389
  27. 142
  28. 314
  29. 314
  30. 43
  31. 283
  32. 493
  33. 84
  34. 262
  35. 435
  36. 258
  37. 181
  38. 247
  39. 551
  40. 163

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