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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 424 · 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. 1.348 − 79 =
  2. 2.89 − 78 =
  3. 3.138 − 96 =
  4. 4.72 − 47 =
  5. 5.588 − 59 =
  6. 6.207 − 66 =
  7. 7.170 − 47 =
  8. 8.277 − 18 =
  9. 9.200 − 47 =
  10. 10.425 − 57 =
  11. 11.403 − 17 =
  12. 12.523 − 69 =
  13. 13.253 − 46 =
  14. 14.78 − 48 =
  15. 15.172 − 56 =
  16. 16.152 − 87 =
  17. 17.544 − 16 =
  18. 18.449 − 27 =
  19. 19.479 − 16 =
  20. 20.174 − 58 =
  21. 21.164 − 58 =
  22. 22.567 − 87 =
  23. 23.84 − 38 =
  24. 24.290 − 68 =
  25. 25.412 − 76 =
  26. 26.175 − 97 =
  27. 27.238 − 79 =
  28. 28.268 − 78 =
  29. 29.125 − 47 =
  30. 30.81 − 76 =
  31. 31.183 − 86 =
  32. 32.420 − 48 =
  33. 33.190 − 18 =
  34. 34.375 − 28 =
  35. 35.294 − 29 =
  36. 36.259 − 66 =
  37. 37.157 − 68 =
  38. 38.198 − 27 =
  39. 39.318 − 29 =
  40. 40.105 − 99 =

Answer key

  1. 269
  2. 11
  3. 42
  4. 25
  5. 529
  6. 141
  7. 123
  8. 259
  9. 153
  10. 368
  11. 386
  12. 454
  13. 207
  14. 30
  15. 116
  16. 65
  17. 528
  18. 422
  19. 463
  20. 116
  21. 106
  22. 480
  23. 46
  24. 222
  25. 336
  26. 78
  27. 159
  28. 190
  29. 78
  30. 5
  31. 97
  32. 372
  33. 172
  34. 347
  35. 265
  36. 193
  37. 89
  38. 171
  39. 289
  40. 6

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