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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 226 · 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. 1.593 − 46 =
  2. 2.506 − 39 =
  3. 3.107 − 57 =
  4. 4.136 − 58 =
  5. 5.388 − 99 =
  6. 6.154 − 86 =
  7. 7.139 − 18 =
  8. 8.294 − 27 =
  9. 9.403 − 36 =
  10. 10.332 − 38 =
  11. 11.429 − 77 =
  12. 12.217 − 59 =
  13. 13.141 − 99 =
  14. 14.146 − 56 =
  15. 15.444 − 46 =
  16. 16.434 − 39 =
  17. 17.172 − 57 =
  18. 18.242 − 76 =
  19. 19.153 − 69 =
  20. 20.136 − 46 =
  21. 21.144 − 16 =
  22. 22.394 − 27 =
  23. 23.506 − 97 =
  24. 24.98 − 18 =
  25. 25.479 − 79 =
  26. 26.174 − 79 =
  27. 27.268 − 36 =
  28. 28.251 − 39 =
  29. 29.241 − 96 =
  30. 30.267 − 17 =
  31. 31.264 − 48 =
  32. 32.367 − 67 =
  33. 33.471 − 66 =
  34. 34.203 − 66 =
  35. 35.191 − 99 =
  36. 36.418 − 47 =
  37. 37.166 − 19 =
  38. 38.203 − 89 =
  39. 39.81 − 59 =
  40. 40.101 − 66 =

Answer key

  1. 547
  2. 467
  3. 50
  4. 78
  5. 289
  6. 68
  7. 121
  8. 267
  9. 367
  10. 294
  11. 352
  12. 158
  13. 42
  14. 90
  15. 398
  16. 395
  17. 115
  18. 166
  19. 84
  20. 90
  21. 128
  22. 367
  23. 409
  24. 80
  25. 400
  26. 95
  27. 232
  28. 212
  29. 145
  30. 250
  31. 216
  32. 300
  33. 405
  34. 137
  35. 92
  36. 371
  37. 147
  38. 114
  39. 22
  40. 35

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