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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 444 · 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. 1.456 − 67 =
  2. 2.441 − 49 =
  3. 3.346 − 29 =
  4. 4.59 − 19 =
  5. 5.256 − 89 =
  6. 6.323 − 19 =
  7. 7.536 − 57 =
  8. 8.158 − 16 =
  9. 9.157 − 97 =
  10. 10.362 − 17 =
  11. 11.553 − 36 =
  12. 12.540 − 28 =
  13. 13.420 − 96 =
  14. 14.287 − 68 =
  15. 15.161 − 89 =
  16. 16.544 − 27 =
  17. 17.172 − 88 =
  18. 18.96 − 87 =
  19. 19.598 − 47 =
  20. 20.335 − 69 =
  21. 21.222 − 57 =
  22. 22.78 − 28 =
  23. 23.470 − 19 =
  24. 24.143 − 26 =
  25. 25.442 − 89 =
  26. 26.389 − 58 =
  27. 27.543 − 27 =
  28. 28.133 − 59 =
  29. 29.89 − 26 =
  30. 30.193 − 98 =
  31. 31.216 − 77 =
  32. 32.118 − 46 =
  33. 33.508 − 26 =
  34. 34.364 − 39 =
  35. 35.320 − 98 =
  36. 36.361 − 19 =
  37. 37.71 − 16 =
  38. 38.151 − 66 =
  39. 39.491 − 27 =
  40. 40.119 − 67 =

Answer key

  1. 389
  2. 392
  3. 317
  4. 40
  5. 167
  6. 304
  7. 479
  8. 142
  9. 60
  10. 345
  11. 517
  12. 512
  13. 324
  14. 219
  15. 72
  16. 517
  17. 84
  18. 9
  19. 551
  20. 266
  21. 165
  22. 50
  23. 451
  24. 117
  25. 353
  26. 331
  27. 516
  28. 74
  29. 63
  30. 95
  31. 139
  32. 72
  33. 482
  34. 325
  35. 222
  36. 342
  37. 55
  38. 85
  39. 464
  40. 52

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