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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 268 · 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. 1.135 − 68 =
  2. 2.473 − 36 =
  3. 3.597 − 66 =
  4. 4.178 − 87 =
  5. 5.556 − 46 =
  6. 6.251 − 69 =
  7. 7.515 − 18 =
  8. 8.101 − 67 =
  9. 9.77 − 66 =
  10. 10.539 − 48 =
  11. 11.292 − 26 =
  12. 12.72 − 69 =
  13. 13.338 − 98 =
  14. 14.501 − 16 =
  15. 15.311 − 96 =
  16. 16.524 − 78 =
  17. 17.314 − 17 =
  18. 18.376 − 68 =
  19. 19.149 − 87 =
  20. 20.455 − 26 =
  21. 21.212 − 39 =
  22. 22.400 − 36 =
  23. 23.105 − 19 =
  24. 24.223 − 39 =
  25. 25.115 − 67 =
  26. 26.218 − 39 =
  27. 27.206 − 88 =
  28. 28.205 − 89 =
  29. 29.498 − 27 =
  30. 30.415 − 16 =
  31. 31.468 − 37 =
  32. 32.160 − 38 =
  33. 33.140 − 19 =
  34. 34.492 − 56 =
  35. 35.210 − 79 =
  36. 36.121 − 76 =
  37. 37.217 − 37 =
  38. 38.191 − 89 =
  39. 39.402 − 26 =
  40. 40.395 − 16 =

Answer key

  1. 67
  2. 437
  3. 531
  4. 91
  5. 510
  6. 182
  7. 497
  8. 34
  9. 11
  10. 491
  11. 266
  12. 3
  13. 240
  14. 485
  15. 215
  16. 446
  17. 297
  18. 308
  19. 62
  20. 429
  21. 173
  22. 364
  23. 86
  24. 184
  25. 48
  26. 179
  27. 118
  28. 116
  29. 471
  30. 399
  31. 431
  32. 122
  33. 121
  34. 436
  35. 131
  36. 45
  37. 180
  38. 102
  39. 376
  40. 379

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