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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 778 · 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. 1.342 − 56 =
  2. 2.166 − 37 =
  3. 3.397 − 46 =
  4. 4.145 − 68 =
  5. 5.454 − 19 =
  6. 6.418 − 99 =
  7. 7.494 − 97 =
  8. 8.372 − 28 =
  9. 9.122 − 46 =
  10. 10.429 − 28 =
  11. 11.354 − 77 =
  12. 12.159 − 78 =
  13. 13.381 − 18 =
  14. 14.282 − 47 =
  15. 15.123 − 18 =
  16. 16.450 − 66 =
  17. 17.188 − 57 =
  18. 18.140 − 67 =
  19. 19.536 − 86 =
  20. 20.498 − 66 =
  21. 21.65 − 26 =
  22. 22.163 − 49 =
  23. 23.515 − 17 =
  24. 24.452 − 29 =
  25. 25.189 − 57 =
  26. 26.145 − 29 =
  27. 27.436 − 17 =
  28. 28.295 − 37 =
  29. 29.316 − 98 =
  30. 30.195 − 87 =
  31. 31.194 − 56 =
  32. 32.151 − 78 =
  33. 33.117 − 49 =
  34. 34.539 − 77 =
  35. 35.559 − 97 =
  36. 36.247 − 16 =
  37. 37.424 − 76 =
  38. 38.591 − 49 =
  39. 39.222 − 26 =
  40. 40.552 − 78 =

Answer key

  1. 286
  2. 129
  3. 351
  4. 77
  5. 435
  6. 319
  7. 397
  8. 344
  9. 76
  10. 401
  11. 277
  12. 81
  13. 363
  14. 235
  15. 105
  16. 384
  17. 131
  18. 73
  19. 450
  20. 432
  21. 39
  22. 114
  23. 498
  24. 423
  25. 132
  26. 116
  27. 419
  28. 258
  29. 218
  30. 108
  31. 138
  32. 73
  33. 68
  34. 462
  35. 462
  36. 231
  37. 348
  38. 542
  39. 196
  40. 474

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