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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 186 · 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. 1.162 − 79 =
  2. 2.418 − 56 =
  3. 3.399 − 68 =
  4. 4.510 − 39 =
  5. 5.477 − 46 =
  6. 6.570 − 26 =
  7. 7.174 − 56 =
  8. 8.513 − 57 =
  9. 9.544 − 58 =
  10. 10.120 − 59 =
  11. 11.70 − 27 =
  12. 12.529 − 89 =
  13. 13.344 − 88 =
  14. 14.336 − 18 =
  15. 15.103 − 88 =
  16. 16.373 − 56 =
  17. 17.371 − 98 =
  18. 18.416 − 16 =
  19. 19.583 − 57 =
  20. 20.60 − 48 =
  21. 21.82 − 57 =
  22. 22.256 − 68 =
  23. 23.517 − 19 =
  24. 24.505 − 69 =
  25. 25.309 − 57 =
  26. 26.557 − 97 =
  27. 27.410 − 86 =
  28. 28.105 − 98 =
  29. 29.286 − 46 =
  30. 30.160 − 86 =
  31. 31.587 − 26 =
  32. 32.276 − 56 =
  33. 33.305 − 29 =
  34. 34.193 − 29 =
  35. 35.575 − 98 =
  36. 36.383 − 39 =
  37. 37.405 − 16 =
  38. 38.483 − 16 =
  39. 39.565 − 38 =
  40. 40.341 − 46 =

Answer key

  1. 83
  2. 362
  3. 331
  4. 471
  5. 431
  6. 544
  7. 118
  8. 456
  9. 486
  10. 61
  11. 43
  12. 440
  13. 256
  14. 318
  15. 15
  16. 317
  17. 273
  18. 400
  19. 526
  20. 12
  21. 25
  22. 188
  23. 498
  24. 436
  25. 252
  26. 460
  27. 324
  28. 7
  29. 240
  30. 74
  31. 561
  32. 220
  33. 276
  34. 164
  35. 477
  36. 344
  37. 389
  38. 467
  39. 527
  40. 295

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