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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 464 · 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. 1.76 − 26 =
  2. 2.118 − 79 =
  3. 3.582 − 97 =
  4. 4.370 − 56 =
  5. 5.278 − 36 =
  6. 6.206 − 69 =
  7. 7.417 − 27 =
  8. 8.115 − 99 =
  9. 9.385 − 37 =
  10. 10.569 − 26 =
  11. 11.451 − 26 =
  12. 12.551 − 96 =
  13. 13.293 − 38 =
  14. 14.166 − 76 =
  15. 15.54 − 27 =
  16. 16.142 − 69 =
  17. 17.581 − 38 =
  18. 18.175 − 47 =
  19. 19.548 − 17 =
  20. 20.416 − 17 =
  21. 21.114 − 27 =
  22. 22.196 − 59 =
  23. 23.253 − 17 =
  24. 24.201 − 67 =
  25. 25.53 − 29 =
  26. 26.73 − 36 =
  27. 27.574 − 69 =
  28. 28.485 − 38 =
  29. 29.222 − 16 =
  30. 30.587 − 56 =
  31. 31.72 − 27 =
  32. 32.200 − 56 =
  33. 33.426 − 48 =
  34. 34.108 − 59 =
  35. 35.409 − 19 =
  36. 36.397 − 59 =
  37. 37.143 − 58 =
  38. 38.569 − 88 =
  39. 39.527 − 28 =
  40. 40.535 − 76 =

Answer key

  1. 50
  2. 39
  3. 485
  4. 314
  5. 242
  6. 137
  7. 390
  8. 16
  9. 348
  10. 543
  11. 425
  12. 455
  13. 255
  14. 90
  15. 27
  16. 73
  17. 543
  18. 128
  19. 531
  20. 399
  21. 87
  22. 137
  23. 236
  24. 134
  25. 24
  26. 37
  27. 505
  28. 447
  29. 206
  30. 531
  31. 45
  32. 144
  33. 378
  34. 49
  35. 390
  36. 338
  37. 85
  38. 481
  39. 499
  40. 459

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