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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 907 · 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. 1.362 − 97 =
  2. 2.206 − 16 =
  3. 3.318 − 49 =
  4. 4.174 − 86 =
  5. 5.587 − 96 =
  6. 6.410 − 29 =
  7. 7.335 − 46 =
  8. 8.69 − 26 =
  9. 9.125 − 19 =
  10. 10.439 − 48 =
  11. 11.266 − 66 =
  12. 12.165 − 96 =
  13. 13.97 − 77 =
  14. 14.432 − 48 =
  15. 15.70 − 38 =
  16. 16.325 − 59 =
  17. 17.238 − 17 =
  18. 18.163 − 89 =
  19. 19.173 − 98 =
  20. 20.219 − 28 =
  21. 21.517 − 57 =
  22. 22.331 − 17 =
  23. 23.579 − 29 =
  24. 24.390 − 49 =
  25. 25.278 − 26 =
  26. 26.279 − 36 =
  27. 27.431 − 39 =
  28. 28.105 − 47 =
  29. 29.97 − 86 =
  30. 30.349 − 96 =
  31. 31.580 − 96 =
  32. 32.238 − 97 =
  33. 33.475 − 17 =
  34. 34.562 − 99 =
  35. 35.162 − 87 =
  36. 36.597 − 36 =
  37. 37.480 − 87 =
  38. 38.373 − 98 =
  39. 39.514 − 47 =
  40. 40.588 − 17 =

Answer key

  1. 265
  2. 190
  3. 269
  4. 88
  5. 491
  6. 381
  7. 289
  8. 43
  9. 106
  10. 391
  11. 200
  12. 69
  13. 20
  14. 384
  15. 32
  16. 266
  17. 221
  18. 74
  19. 75
  20. 191
  21. 460
  22. 314
  23. 550
  24. 341
  25. 252
  26. 243
  27. 392
  28. 58
  29. 11
  30. 253
  31. 484
  32. 141
  33. 458
  34. 463
  35. 75
  36. 561
  37. 393
  38. 275
  39. 467
  40. 571

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