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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 65 · 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. 1.524 − 99 =
  2. 2.155 − 17 =
  3. 3.112 − 69 =
  4. 4.399 − 76 =
  5. 5.185 − 98 =
  6. 6.164 − 67 =
  7. 7.336 − 98 =
  8. 8.289 − 67 =
  9. 9.67 − 48 =
  10. 10.197 − 87 =
  11. 11.503 − 69 =
  12. 12.455 − 28 =
  13. 13.182 − 47 =
  14. 14.529 − 16 =
  15. 15.170 − 56 =
  16. 16.156 − 67 =
  17. 17.170 − 56 =
  18. 18.159 − 17 =
  19. 19.212 − 27 =
  20. 20.179 − 78 =
  21. 21.207 − 59 =
  22. 22.440 − 49 =
  23. 23.550 − 59 =
  24. 24.179 − 37 =
  25. 25.412 − 58 =
  26. 26.431 − 18 =
  27. 27.210 − 56 =
  28. 28.358 − 16 =
  29. 29.341 − 77 =
  30. 30.543 − 47 =
  31. 31.404 − 16 =
  32. 32.357 − 18 =
  33. 33.455 − 28 =
  34. 34.515 − 59 =
  35. 35.217 − 66 =
  36. 36.512 − 19 =
  37. 37.433 − 37 =
  38. 38.192 − 86 =
  39. 39.292 − 38 =
  40. 40.82 − 56 =

Answer key

  1. 425
  2. 138
  3. 43
  4. 323
  5. 87
  6. 97
  7. 238
  8. 222
  9. 19
  10. 110
  11. 434
  12. 427
  13. 135
  14. 513
  15. 114
  16. 89
  17. 114
  18. 142
  19. 185
  20. 101
  21. 148
  22. 391
  23. 491
  24. 142
  25. 354
  26. 413
  27. 154
  28. 342
  29. 264
  30. 496
  31. 388
  32. 339
  33. 427
  34. 456
  35. 151
  36. 493
  37. 396
  38. 106
  39. 254
  40. 26

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