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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 281 · 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. 1.413 − 67 =
  2. 2.81 − 77 =
  3. 3.541 − 96 =
  4. 4.197 − 18 =
  5. 5.197 − 47 =
  6. 6.279 − 36 =
  7. 7.452 − 17 =
  8. 8.519 − 99 =
  9. 9.107 − 86 =
  10. 10.151 − 29 =
  11. 11.522 − 47 =
  12. 12.168 − 28 =
  13. 13.457 − 38 =
  14. 14.504 − 27 =
  15. 15.410 − 59 =
  16. 16.209 − 49 =
  17. 17.163 − 27 =
  18. 18.473 − 67 =
  19. 19.313 − 38 =
  20. 20.310 − 97 =
  21. 21.493 − 29 =
  22. 22.66 − 28 =
  23. 23.404 − 97 =
  24. 24.286 − 89 =
  25. 25.389 − 96 =
  26. 26.324 − 79 =
  27. 27.514 − 66 =
  28. 28.196 − 96 =
  29. 29.167 − 56 =
  30. 30.301 − 19 =
  31. 31.506 − 29 =
  32. 32.439 − 67 =
  33. 33.192 − 87 =
  34. 34.254 − 96 =
  35. 35.510 − 77 =
  36. 36.580 − 16 =
  37. 37.534 − 68 =
  38. 38.421 − 59 =
  39. 39.103 − 89 =
  40. 40.214 − 56 =

Answer key

  1. 346
  2. 4
  3. 445
  4. 179
  5. 150
  6. 243
  7. 435
  8. 420
  9. 21
  10. 122
  11. 475
  12. 140
  13. 419
  14. 477
  15. 351
  16. 160
  17. 136
  18. 406
  19. 275
  20. 213
  21. 464
  22. 38
  23. 307
  24. 197
  25. 293
  26. 245
  27. 448
  28. 100
  29. 111
  30. 282
  31. 477
  32. 372
  33. 105
  34. 158
  35. 433
  36. 564
  37. 466
  38. 362
  39. 14
  40. 158

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