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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 332 · 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. 1.222 − 67 =
  2. 2.197 − 89 =
  3. 3.579 − 87 =
  4. 4.362 − 47 =
  5. 5.408 − 26 =
  6. 6.444 − 89 =
  7. 7.559 − 56 =
  8. 8.540 − 48 =
  9. 9.86 − 58 =
  10. 10.503 − 58 =
  11. 11.441 − 28 =
  12. 12.477 − 48 =
  13. 13.104 − 57 =
  14. 14.571 − 79 =
  15. 15.293 − 49 =
  16. 16.164 − 76 =
  17. 17.597 − 67 =
  18. 18.329 − 57 =
  19. 19.340 − 97 =
  20. 20.596 − 77 =
  21. 21.528 − 18 =
  22. 22.397 − 17 =
  23. 23.411 − 57 =
  24. 24.324 − 18 =
  25. 25.185 − 78 =
  26. 26.127 − 26 =
  27. 27.134 − 37 =
  28. 28.65 − 18 =
  29. 29.410 − 69 =
  30. 30.336 − 77 =
  31. 31.330 − 87 =
  32. 32.138 − 28 =
  33. 33.275 − 78 =
  34. 34.475 − 38 =
  35. 35.177 − 98 =
  36. 36.177 − 79 =
  37. 37.481 − 77 =
  38. 38.398 − 66 =
  39. 39.490 − 47 =
  40. 40.294 − 97 =

Answer key

  1. 155
  2. 108
  3. 492
  4. 315
  5. 382
  6. 355
  7. 503
  8. 492
  9. 28
  10. 445
  11. 413
  12. 429
  13. 47
  14. 492
  15. 244
  16. 88
  17. 530
  18. 272
  19. 243
  20. 519
  21. 510
  22. 380
  23. 354
  24. 306
  25. 107
  26. 101
  27. 97
  28. 47
  29. 341
  30. 259
  31. 243
  32. 110
  33. 197
  34. 437
  35. 79
  36. 98
  37. 404
  38. 332
  39. 443
  40. 197

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