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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 129 · 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. 1.413 − 29 =
  2. 2.84 − 26 =
  3. 3.227 − 16 =
  4. 4.150 − 96 =
  5. 5.295 − 57 =
  6. 6.548 − 88 =
  7. 7.238 − 38 =
  8. 8.403 − 46 =
  9. 9.485 − 27 =
  10. 10.351 − 28 =
  11. 11.155 − 67 =
  12. 12.169 − 37 =
  13. 13.421 − 88 =
  14. 14.127 − 16 =
  15. 15.521 − 18 =
  16. 16.150 − 19 =
  17. 17.214 − 26 =
  18. 18.478 − 57 =
  19. 19.393 − 87 =
  20. 20.357 − 58 =
  21. 21.280 − 29 =
  22. 22.576 − 19 =
  23. 23.538 − 89 =
  24. 24.550 − 76 =
  25. 25.185 − 47 =
  26. 26.372 − 46 =
  27. 27.217 − 39 =
  28. 28.445 − 16 =
  29. 29.499 − 47 =
  30. 30.239 − 48 =
  31. 31.98 − 66 =
  32. 32.171 − 49 =
  33. 33.206 − 36 =
  34. 34.111 − 26 =
  35. 35.240 − 38 =
  36. 36.477 − 76 =
  37. 37.52 − 46 =
  38. 38.401 − 16 =
  39. 39.264 − 38 =
  40. 40.276 − 67 =

Answer key

  1. 384
  2. 58
  3. 211
  4. 54
  5. 238
  6. 460
  7. 200
  8. 357
  9. 458
  10. 323
  11. 88
  12. 132
  13. 333
  14. 111
  15. 503
  16. 131
  17. 188
  18. 421
  19. 306
  20. 299
  21. 251
  22. 557
  23. 449
  24. 474
  25. 138
  26. 326
  27. 178
  28. 429
  29. 452
  30. 191
  31. 32
  32. 122
  33. 170
  34. 85
  35. 202
  36. 401
  37. 6
  38. 385
  39. 226
  40. 209

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