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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 519 · 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. 1.174 − 87 =
  2. 2.115 − 78 =
  3. 3.484 − 26 =
  4. 4.112 − 47 =
  5. 5.557 − 89 =
  6. 6.229 − 36 =
  7. 7.69 − 19 =
  8. 8.403 − 46 =
  9. 9.134 − 78 =
  10. 10.364 − 29 =
  11. 11.171 − 86 =
  12. 12.501 − 88 =
  13. 13.436 − 56 =
  14. 14.506 − 17 =
  15. 15.502 − 36 =
  16. 16.467 − 66 =
  17. 17.168 − 96 =
  18. 18.234 − 39 =
  19. 19.491 − 48 =
  20. 20.246 − 67 =
  21. 21.246 − 88 =
  22. 22.155 − 79 =
  23. 23.280 − 59 =
  24. 24.563 − 67 =
  25. 25.367 − 58 =
  26. 26.209 − 86 =
  27. 27.533 − 49 =
  28. 28.527 − 27 =
  29. 29.144 − 19 =
  30. 30.281 − 29 =
  31. 31.141 − 46 =
  32. 32.294 − 38 =
  33. 33.313 − 18 =
  34. 34.535 − 56 =
  35. 35.212 − 49 =
  36. 36.479 − 17 =
  37. 37.506 − 68 =
  38. 38.102 − 56 =
  39. 39.309 − 66 =
  40. 40.101 − 16 =

Answer key

  1. 87
  2. 37
  3. 458
  4. 65
  5. 468
  6. 193
  7. 50
  8. 357
  9. 56
  10. 335
  11. 85
  12. 413
  13. 380
  14. 489
  15. 466
  16. 401
  17. 72
  18. 195
  19. 443
  20. 179
  21. 158
  22. 76
  23. 221
  24. 496
  25. 309
  26. 123
  27. 484
  28. 500
  29. 125
  30. 252
  31. 95
  32. 256
  33. 295
  34. 479
  35. 163
  36. 462
  37. 438
  38. 46
  39. 243
  40. 85

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