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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 876 · 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. 1.97 − 68 =
  2. 2.545 − 26 =
  3. 3.314 − 28 =
  4. 4.369 − 98 =
  5. 5.574 − 19 =
  6. 6.408 − 37 =
  7. 7.384 − 19 =
  8. 8.251 − 77 =
  9. 9.568 − 39 =
  10. 10.499 − 26 =
  11. 11.309 − 39 =
  12. 12.177 − 98 =
  13. 13.414 − 16 =
  14. 14.317 − 18 =
  15. 15.206 − 87 =
  16. 16.164 − 38 =
  17. 17.314 − 56 =
  18. 18.200 − 88 =
  19. 19.132 − 19 =
  20. 20.181 − 27 =
  21. 21.306 − 76 =
  22. 22.482 − 39 =
  23. 23.545 − 16 =
  24. 24.401 − 69 =
  25. 25.131 − 97 =
  26. 26.83 − 27 =
  27. 27.200 − 28 =
  28. 28.75 − 17 =
  29. 29.213 − 96 =
  30. 30.72 − 67 =
  31. 31.167 − 77 =
  32. 32.557 − 69 =
  33. 33.548 − 99 =
  34. 34.590 − 26 =
  35. 35.461 − 86 =
  36. 36.92 − 36 =
  37. 37.254 − 49 =
  38. 38.101 − 58 =
  39. 39.552 − 57 =
  40. 40.206 − 99 =

Answer key

  1. 29
  2. 519
  3. 286
  4. 271
  5. 555
  6. 371
  7. 365
  8. 174
  9. 529
  10. 473
  11. 270
  12. 79
  13. 398
  14. 299
  15. 119
  16. 126
  17. 258
  18. 112
  19. 113
  20. 154
  21. 230
  22. 443
  23. 529
  24. 332
  25. 34
  26. 56
  27. 172
  28. 58
  29. 117
  30. 5
  31. 90
  32. 488
  33. 449
  34. 564
  35. 375
  36. 56
  37. 205
  38. 43
  39. 495
  40. 107

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