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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 303 · 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. 1.444 − 56 =
  2. 2.463 − 58 =
  3. 3.66 − 16 =
  4. 4.337 − 78 =
  5. 5.495 − 98 =
  6. 6.76 − 57 =
  7. 7.263 − 77 =
  8. 8.480 − 48 =
  9. 9.421 − 27 =
  10. 10.68 − 16 =
  11. 11.553 − 78 =
  12. 12.308 − 66 =
  13. 13.438 − 46 =
  14. 14.242 − 28 =
  15. 15.69 − 46 =
  16. 16.154 − 96 =
  17. 17.433 − 48 =
  18. 18.168 − 59 =
  19. 19.212 − 46 =
  20. 20.101 − 69 =
  21. 21.511 − 19 =
  22. 22.149 − 47 =
  23. 23.208 − 59 =
  24. 24.535 − 26 =
  25. 25.253 − 58 =
  26. 26.225 − 16 =
  27. 27.167 − 49 =
  28. 28.105 − 36 =
  29. 29.173 − 78 =
  30. 30.137 − 36 =
  31. 31.379 − 98 =
  32. 32.109 − 89 =
  33. 33.178 − 36 =
  34. 34.163 − 68 =
  35. 35.427 − 77 =
  36. 36.490 − 46 =
  37. 37.261 − 27 =
  38. 38.96 − 77 =
  39. 39.149 − 46 =
  40. 40.453 − 69 =

Answer key

  1. 388
  2. 405
  3. 50
  4. 259
  5. 397
  6. 19
  7. 186
  8. 432
  9. 394
  10. 52
  11. 475
  12. 242
  13. 392
  14. 214
  15. 23
  16. 58
  17. 385
  18. 109
  19. 166
  20. 32
  21. 492
  22. 102
  23. 149
  24. 509
  25. 195
  26. 209
  27. 118
  28. 69
  29. 95
  30. 101
  31. 281
  32. 20
  33. 142
  34. 95
  35. 350
  36. 444
  37. 234
  38. 19
  39. 103
  40. 384

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