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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 452 · 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. 1.406 − 97 =
  2. 2.273 − 98 =
  3. 3.358 − 78 =
  4. 4.587 − 56 =
  5. 5.279 − 48 =
  6. 6.116 − 27 =
  7. 7.540 − 78 =
  8. 8.227 − 16 =
  9. 9.440 − 38 =
  10. 10.431 − 26 =
  11. 11.194 − 76 =
  12. 12.181 − 89 =
  13. 13.102 − 26 =
  14. 14.82 − 38 =
  15. 15.298 − 37 =
  16. 16.293 − 37 =
  17. 17.457 − 76 =
  18. 18.175 − 86 =
  19. 19.525 − 49 =
  20. 20.365 − 27 =
  21. 21.209 − 26 =
  22. 22.435 − 36 =
  23. 23.595 − 19 =
  24. 24.114 − 29 =
  25. 25.263 − 67 =
  26. 26.341 − 19 =
  27. 27.398 − 98 =
  28. 28.533 − 59 =
  29. 29.174 − 46 =
  30. 30.79 − 26 =
  31. 31.456 − 37 =
  32. 32.89 − 66 =
  33. 33.502 − 98 =
  34. 34.455 − 38 =
  35. 35.313 − 28 =
  36. 36.193 − 16 =
  37. 37.523 − 69 =
  38. 38.85 − 38 =
  39. 39.593 − 47 =
  40. 40.274 − 78 =

Answer key

  1. 309
  2. 175
  3. 280
  4. 531
  5. 231
  6. 89
  7. 462
  8. 211
  9. 402
  10. 405
  11. 118
  12. 92
  13. 76
  14. 44
  15. 261
  16. 256
  17. 381
  18. 89
  19. 476
  20. 338
  21. 183
  22. 399
  23. 576
  24. 85
  25. 196
  26. 322
  27. 300
  28. 474
  29. 128
  30. 53
  31. 419
  32. 23
  33. 404
  34. 417
  35. 285
  36. 177
  37. 454
  38. 47
  39. 546
  40. 196

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