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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 659 · 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. 1.153 − 59 =
  2. 2.104 − 87 =
  3. 3.137 − 99 =
  4. 4.192 − 27 =
  5. 5.216 − 29 =
  6. 6.512 − 68 =
  7. 7.239 − 99 =
  8. 8.395 − 29 =
  9. 9.64 − 27 =
  10. 10.193 − 96 =
  11. 11.581 − 19 =
  12. 12.496 − 89 =
  13. 13.409 − 19 =
  14. 14.181 − 99 =
  15. 15.195 − 57 =
  16. 16.91 − 26 =
  17. 17.557 − 99 =
  18. 18.295 − 18 =
  19. 19.153 − 96 =
  20. 20.450 − 59 =
  21. 21.192 − 98 =
  22. 22.377 − 58 =
  23. 23.170 − 77 =
  24. 24.449 − 28 =
  25. 25.193 − 78 =
  26. 26.430 − 47 =
  27. 27.230 − 78 =
  28. 28.182 − 68 =
  29. 29.183 − 49 =
  30. 30.209 − 97 =
  31. 31.406 − 86 =
  32. 32.139 − 26 =
  33. 33.545 − 89 =
  34. 34.227 − 37 =
  35. 35.362 − 27 =
  36. 36.550 − 97 =
  37. 37.142 − 28 =
  38. 38.575 − 86 =
  39. 39.320 − 39 =
  40. 40.533 − 66 =

Answer key

  1. 94
  2. 17
  3. 38
  4. 165
  5. 187
  6. 444
  7. 140
  8. 366
  9. 37
  10. 97
  11. 562
  12. 407
  13. 390
  14. 82
  15. 138
  16. 65
  17. 458
  18. 277
  19. 57
  20. 391
  21. 94
  22. 319
  23. 93
  24. 421
  25. 115
  26. 383
  27. 152
  28. 114
  29. 134
  30. 112
  31. 320
  32. 113
  33. 456
  34. 190
  35. 335
  36. 453
  37. 114
  38. 489
  39. 281
  40. 467

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