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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 514 · 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. 1.126 − 99 =
  2. 2.112 − 19 =
  3. 3.115 − 68 =
  4. 4.566 − 28 =
  5. 5.539 − 39 =
  6. 6.348 − 57 =
  7. 7.496 − 88 =
  8. 8.216 − 87 =
  9. 9.451 − 66 =
  10. 10.280 − 66 =
  11. 11.98 − 66 =
  12. 12.352 − 69 =
  13. 13.298 − 66 =
  14. 14.304 − 96 =
  15. 15.260 − 37 =
  16. 16.179 − 18 =
  17. 17.155 − 89 =
  18. 18.158 − 76 =
  19. 19.516 − 46 =
  20. 20.464 − 76 =
  21. 21.557 − 58 =
  22. 22.180 − 66 =
  23. 23.343 − 96 =
  24. 24.93 − 76 =
  25. 25.538 − 66 =
  26. 26.208 − 56 =
  27. 27.180 − 96 =
  28. 28.87 − 59 =
  29. 29.575 − 88 =
  30. 30.168 − 99 =
  31. 31.138 − 26 =
  32. 32.351 − 88 =
  33. 33.117 − 18 =
  34. 34.193 − 36 =
  35. 35.549 − 29 =
  36. 36.260 − 66 =
  37. 37.358 − 18 =
  38. 38.252 − 47 =
  39. 39.157 − 48 =
  40. 40.546 − 76 =

Answer key

  1. 27
  2. 93
  3. 47
  4. 538
  5. 500
  6. 291
  7. 408
  8. 129
  9. 385
  10. 214
  11. 32
  12. 283
  13. 232
  14. 208
  15. 223
  16. 161
  17. 66
  18. 82
  19. 470
  20. 388
  21. 499
  22. 114
  23. 247
  24. 17
  25. 472
  26. 152
  27. 84
  28. 28
  29. 487
  30. 69
  31. 112
  32. 263
  33. 99
  34. 157
  35. 520
  36. 194
  37. 340
  38. 205
  39. 109
  40. 470

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