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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 657 · 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. 1.553 − 96 =
  2. 2.218 − 79 =
  3. 3.174 − 18 =
  4. 4.393 − 86 =
  5. 5.441 − 26 =
  6. 6.69 − 58 =
  7. 7.551 − 27 =
  8. 8.576 − 69 =
  9. 9.184 − 57 =
  10. 10.87 − 39 =
  11. 11.373 − 36 =
  12. 12.480 − 16 =
  13. 13.189 − 26 =
  14. 14.339 − 27 =
  15. 15.283 − 38 =
  16. 16.509 − 47 =
  17. 17.349 − 26 =
  18. 18.217 − 29 =
  19. 19.413 − 37 =
  20. 20.124 − 76 =
  21. 21.139 − 96 =
  22. 22.186 − 56 =
  23. 23.461 − 26 =
  24. 24.566 − 38 =
  25. 25.516 − 58 =
  26. 26.584 − 26 =
  27. 27.527 − 57 =
  28. 28.187 − 99 =
  29. 29.479 − 46 =
  30. 30.183 − 19 =
  31. 31.454 − 37 =
  32. 32.111 − 49 =
  33. 33.172 − 89 =
  34. 34.293 − 77 =
  35. 35.159 − 66 =
  36. 36.539 − 97 =
  37. 37.77 − 37 =
  38. 38.273 − 79 =
  39. 39.101 − 16 =
  40. 40.591 − 56 =

Answer key

  1. 457
  2. 139
  3. 156
  4. 307
  5. 415
  6. 11
  7. 524
  8. 507
  9. 127
  10. 48
  11. 337
  12. 464
  13. 163
  14. 312
  15. 245
  16. 462
  17. 323
  18. 188
  19. 376
  20. 48
  21. 43
  22. 130
  23. 435
  24. 528
  25. 458
  26. 558
  27. 470
  28. 88
  29. 433
  30. 164
  31. 417
  32. 62
  33. 83
  34. 216
  35. 93
  36. 442
  37. 40
  38. 194
  39. 85
  40. 535

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