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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 658 · 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. 1.468 − 28 =
  2. 2.144 − 97 =
  3. 3.597 − 88 =
  4. 4.555 − 86 =
  5. 5.524 − 79 =
  6. 6.112 − 27 =
  7. 7.222 − 28 =
  8. 8.140 − 29 =
  9. 9.395 − 26 =
  10. 10.328 − 18 =
  11. 11.173 − 79 =
  12. 12.180 − 69 =
  13. 13.128 − 39 =
  14. 14.110 − 29 =
  15. 15.169 − 86 =
  16. 16.372 − 17 =
  17. 17.554 − 97 =
  18. 18.205 − 76 =
  19. 19.314 − 49 =
  20. 20.122 − 99 =
  21. 21.299 − 77 =
  22. 22.220 − 16 =
  23. 23.57 − 29 =
  24. 24.321 − 97 =
  25. 25.413 − 29 =
  26. 26.409 − 19 =
  27. 27.458 − 27 =
  28. 28.240 − 29 =
  29. 29.474 − 68 =
  30. 30.258 − 46 =
  31. 31.408 − 16 =
  32. 32.105 − 79 =
  33. 33.372 − 28 =
  34. 34.151 − 79 =
  35. 35.175 − 97 =
  36. 36.194 − 88 =
  37. 37.340 − 88 =
  38. 38.364 − 27 =
  39. 39.191 − 49 =
  40. 40.246 − 49 =

Answer key

  1. 440
  2. 47
  3. 509
  4. 469
  5. 445
  6. 85
  7. 194
  8. 111
  9. 369
  10. 310
  11. 94
  12. 111
  13. 89
  14. 81
  15. 83
  16. 355
  17. 457
  18. 129
  19. 265
  20. 23
  21. 222
  22. 204
  23. 28
  24. 224
  25. 384
  26. 390
  27. 431
  28. 211
  29. 406
  30. 212
  31. 392
  32. 26
  33. 344
  34. 72
  35. 78
  36. 106
  37. 252
  38. 337
  39. 142
  40. 197

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