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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 245 · 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. 1.263 − 98 =
  2. 2.293 − 39 =
  3. 3.463 − 66 =
  4. 4.498 − 57 =
  5. 5.423 − 88 =
  6. 6.101 − 26 =
  7. 7.189 − 98 =
  8. 8.205 − 26 =
  9. 9.417 − 79 =
  10. 10.411 − 28 =
  11. 11.135 − 39 =
  12. 12.133 − 77 =
  13. 13.182 − 16 =
  14. 14.126 − 87 =
  15. 15.140 − 36 =
  16. 16.184 − 46 =
  17. 17.529 − 38 =
  18. 18.443 − 98 =
  19. 19.159 − 88 =
  20. 20.473 − 26 =
  21. 21.120 − 76 =
  22. 22.52 − 36 =
  23. 23.310 − 89 =
  24. 24.388 − 99 =
  25. 25.355 − 66 =
  26. 26.386 − 78 =
  27. 27.294 − 97 =
  28. 28.593 − 69 =
  29. 29.163 − 89 =
  30. 30.98 − 38 =
  31. 31.158 − 37 =
  32. 32.177 − 86 =
  33. 33.213 − 99 =
  34. 34.79 − 57 =
  35. 35.410 − 16 =
  36. 36.373 − 57 =
  37. 37.437 − 99 =
  38. 38.182 − 59 =
  39. 39.251 − 46 =
  40. 40.397 − 48 =

Answer key

  1. 165
  2. 254
  3. 397
  4. 441
  5. 335
  6. 75
  7. 91
  8. 179
  9. 338
  10. 383
  11. 96
  12. 56
  13. 166
  14. 39
  15. 104
  16. 138
  17. 491
  18. 345
  19. 71
  20. 447
  21. 44
  22. 16
  23. 221
  24. 289
  25. 289
  26. 308
  27. 197
  28. 524
  29. 74
  30. 60
  31. 121
  32. 91
  33. 114
  34. 22
  35. 394
  36. 316
  37. 338
  38. 123
  39. 205
  40. 349

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