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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 554 · 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. 1.488 − 48 =
  2. 2.69 − 67 =
  3. 3.159 − 87 =
  4. 4.442 − 29 =
  5. 5.100 − 49 =
  6. 6.510 − 67 =
  7. 7.479 − 29 =
  8. 8.145 − 36 =
  9. 9.77 − 49 =
  10. 10.480 − 46 =
  11. 11.227 − 39 =
  12. 12.584 − 26 =
  13. 13.75 − 56 =
  14. 14.206 − 97 =
  15. 15.388 − 39 =
  16. 16.192 − 78 =
  17. 17.185 − 98 =
  18. 18.248 − 16 =
  19. 19.58 − 17 =
  20. 20.406 − 48 =
  21. 21.326 − 47 =
  22. 22.468 − 19 =
  23. 23.110 − 99 =
  24. 24.183 − 86 =
  25. 25.152 − 66 =
  26. 26.188 − 49 =
  27. 27.126 − 67 =
  28. 28.537 − 36 =
  29. 29.105 − 49 =
  30. 30.443 − 59 =
  31. 31.169 − 39 =
  32. 32.523 − 56 =
  33. 33.546 − 47 =
  34. 34.149 − 57 =
  35. 35.270 − 49 =
  36. 36.297 − 97 =
  37. 37.123 − 26 =
  38. 38.97 − 96 =
  39. 39.438 − 39 =
  40. 40.72 − 39 =

Answer key

  1. 440
  2. 2
  3. 72
  4. 413
  5. 51
  6. 443
  7. 450
  8. 109
  9. 28
  10. 434
  11. 188
  12. 558
  13. 19
  14. 109
  15. 349
  16. 114
  17. 87
  18. 232
  19. 41
  20. 358
  21. 279
  22. 449
  23. 11
  24. 97
  25. 86
  26. 139
  27. 59
  28. 501
  29. 56
  30. 384
  31. 130
  32. 467
  33. 499
  34. 92
  35. 221
  36. 200
  37. 97
  38. 1
  39. 399
  40. 33

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