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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 328 · 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. 1.540 − 66 =
  2. 2.59 − 19 =
  3. 3.154 − 76 =
  4. 4.254 − 76 =
  5. 5.243 − 17 =
  6. 6.91 − 77 =
  7. 7.470 − 49 =
  8. 8.138 − 99 =
  9. 9.227 − 26 =
  10. 10.401 − 77 =
  11. 11.131 − 36 =
  12. 12.141 − 59 =
  13. 13.386 − 58 =
  14. 14.150 − 98 =
  15. 15.587 − 77 =
  16. 16.280 − 67 =
  17. 17.165 − 38 =
  18. 18.174 − 47 =
  19. 19.477 − 76 =
  20. 20.483 − 77 =
  21. 21.589 − 59 =
  22. 22.220 − 37 =
  23. 23.111 − 29 =
  24. 24.213 − 86 =
  25. 25.303 − 57 =
  26. 26.260 − 87 =
  27. 27.515 − 48 =
  28. 28.224 − 18 =
  29. 29.563 − 56 =
  30. 30.413 − 88 =
  31. 31.230 − 38 =
  32. 32.403 − 97 =
  33. 33.134 − 38 =
  34. 34.497 − 96 =
  35. 35.179 − 78 =
  36. 36.375 − 28 =
  37. 37.561 − 57 =
  38. 38.147 − 26 =
  39. 39.329 − 56 =
  40. 40.542 − 67 =

Answer key

  1. 474
  2. 40
  3. 78
  4. 178
  5. 226
  6. 14
  7. 421
  8. 39
  9. 201
  10. 324
  11. 95
  12. 82
  13. 328
  14. 52
  15. 510
  16. 213
  17. 127
  18. 127
  19. 401
  20. 406
  21. 530
  22. 183
  23. 82
  24. 127
  25. 246
  26. 173
  27. 467
  28. 206
  29. 507
  30. 325
  31. 192
  32. 306
  33. 96
  34. 401
  35. 101
  36. 347
  37. 504
  38. 121
  39. 273
  40. 475

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