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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 557 · 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. 1.72 − 69 =
  2. 2.449 − 79 =
  3. 3.67 − 58 =
  4. 4.247 − 28 =
  5. 5.210 − 59 =
  6. 6.342 − 78 =
  7. 7.62 − 16 =
  8. 8.302 − 18 =
  9. 9.194 − 48 =
  10. 10.508 − 26 =
  11. 11.430 − 99 =
  12. 12.505 − 28 =
  13. 13.186 − 26 =
  14. 14.203 − 16 =
  15. 15.89 − 17 =
  16. 16.579 − 97 =
  17. 17.127 − 57 =
  18. 18.392 − 29 =
  19. 19.105 − 46 =
  20. 20.557 − 48 =
  21. 21.91 − 48 =
  22. 22.182 − 29 =
  23. 23.298 − 28 =
  24. 24.373 − 19 =
  25. 25.472 − 97 =
  26. 26.561 − 39 =
  27. 27.80 − 69 =
  28. 28.459 − 56 =
  29. 29.122 − 18 =
  30. 30.87 − 46 =
  31. 31.212 − 99 =
  32. 32.57 − 39 =
  33. 33.559 − 19 =
  34. 34.323 − 28 =
  35. 35.327 − 38 =
  36. 36.162 − 76 =
  37. 37.477 − 26 =
  38. 38.121 − 39 =
  39. 39.349 − 38 =
  40. 40.562 − 76 =

Answer key

  1. 3
  2. 370
  3. 9
  4. 219
  5. 151
  6. 264
  7. 46
  8. 284
  9. 146
  10. 482
  11. 331
  12. 477
  13. 160
  14. 187
  15. 72
  16. 482
  17. 70
  18. 363
  19. 59
  20. 509
  21. 43
  22. 153
  23. 270
  24. 354
  25. 375
  26. 522
  27. 11
  28. 403
  29. 104
  30. 41
  31. 113
  32. 18
  33. 540
  34. 295
  35. 289
  36. 86
  37. 451
  38. 82
  39. 311
  40. 486

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