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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 756 · 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. 1.191 − 18 =
  2. 2.233 − 46 =
  3. 3.338 − 98 =
  4. 4.215 − 56 =
  5. 5.306 − 97 =
  6. 6.446 − 99 =
  7. 7.316 − 38 =
  8. 8.106 − 88 =
  9. 9.65 − 26 =
  10. 10.579 − 47 =
  11. 11.185 − 29 =
  12. 12.191 − 99 =
  13. 13.225 − 97 =
  14. 14.360 − 37 =
  15. 15.83 − 18 =
  16. 16.374 − 78 =
  17. 17.457 − 98 =
  18. 18.586 − 77 =
  19. 19.355 − 48 =
  20. 20.173 − 77 =
  21. 21.313 − 67 =
  22. 22.415 − 56 =
  23. 23.211 − 18 =
  24. 24.175 − 89 =
  25. 25.477 − 86 =
  26. 26.465 − 46 =
  27. 27.579 − 76 =
  28. 28.81 − 48 =
  29. 29.198 − 16 =
  30. 30.450 − 28 =
  31. 31.157 − 46 =
  32. 32.396 − 27 =
  33. 33.174 − 87 =
  34. 34.381 − 67 =
  35. 35.435 − 29 =
  36. 36.585 − 36 =
  37. 37.197 − 69 =
  38. 38.452 − 36 =
  39. 39.126 − 26 =
  40. 40.318 − 68 =

Answer key

  1. 173
  2. 187
  3. 240
  4. 159
  5. 209
  6. 347
  7. 278
  8. 18
  9. 39
  10. 532
  11. 156
  12. 92
  13. 128
  14. 323
  15. 65
  16. 296
  17. 359
  18. 509
  19. 307
  20. 96
  21. 246
  22. 359
  23. 193
  24. 86
  25. 391
  26. 419
  27. 503
  28. 33
  29. 182
  30. 422
  31. 111
  32. 369
  33. 87
  34. 314
  35. 406
  36. 549
  37. 128
  38. 416
  39. 100
  40. 250

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