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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 230 · 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. 1.214 − 88 =
  2. 2.53 − 36 =
  3. 3.152 − 48 =
  4. 4.195 − 56 =
  5. 5.272 − 48 =
  6. 6.599 − 79 =
  7. 7.403 − 39 =
  8. 8.339 − 49 =
  9. 9.498 − 88 =
  10. 10.159 − 56 =
  11. 11.183 − 47 =
  12. 12.156 − 99 =
  13. 13.225 − 99 =
  14. 14.501 − 48 =
  15. 15.168 − 78 =
  16. 16.403 − 86 =
  17. 17.116 − 96 =
  18. 18.177 − 96 =
  19. 19.427 − 27 =
  20. 20.340 − 26 =
  21. 21.144 − 66 =
  22. 22.559 − 96 =
  23. 23.411 − 68 =
  24. 24.434 − 39 =
  25. 25.396 − 98 =
  26. 26.390 − 57 =
  27. 27.518 − 49 =
  28. 28.145 − 18 =
  29. 29.216 − 18 =
  30. 30.512 − 77 =
  31. 31.229 − 39 =
  32. 32.326 − 56 =
  33. 33.115 − 38 =
  34. 34.581 − 26 =
  35. 35.397 − 46 =
  36. 36.166 − 48 =
  37. 37.77 − 56 =
  38. 38.282 − 19 =
  39. 39.547 − 19 =
  40. 40.366 − 26 =

Answer key

  1. 126
  2. 17
  3. 104
  4. 139
  5. 224
  6. 520
  7. 364
  8. 290
  9. 410
  10. 103
  11. 136
  12. 57
  13. 126
  14. 453
  15. 90
  16. 317
  17. 20
  18. 81
  19. 400
  20. 314
  21. 78
  22. 463
  23. 343
  24. 395
  25. 298
  26. 333
  27. 469
  28. 127
  29. 198
  30. 435
  31. 190
  32. 270
  33. 77
  34. 555
  35. 351
  36. 118
  37. 21
  38. 263
  39. 528
  40. 340

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