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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 286 · 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. 1.323 − 48 =
  2. 2.538 − 56 =
  3. 3.146 − 76 =
  4. 4.445 − 69 =
  5. 5.473 − 96 =
  6. 6.287 − 56 =
  7. 7.458 − 78 =
  8. 8.513 − 27 =
  9. 9.172 − 87 =
  10. 10.183 − 96 =
  11. 11.337 − 96 =
  12. 12.324 − 27 =
  13. 13.243 − 58 =
  14. 14.166 − 97 =
  15. 15.99 − 96 =
  16. 16.204 − 39 =
  17. 17.190 − 36 =
  18. 18.530 − 47 =
  19. 19.59 − 49 =
  20. 20.574 − 59 =
  21. 21.127 − 19 =
  22. 22.152 − 88 =
  23. 23.235 − 86 =
  24. 24.174 − 87 =
  25. 25.111 − 87 =
  26. 26.196 − 86 =
  27. 27.283 − 26 =
  28. 28.95 − 56 =
  29. 29.591 − 99 =
  30. 30.159 − 98 =
  31. 31.187 − 98 =
  32. 32.200 − 27 =
  33. 33.465 − 16 =
  34. 34.423 − 28 =
  35. 35.132 − 17 =
  36. 36.69 − 38 =
  37. 37.166 − 77 =
  38. 38.514 − 27 =
  39. 39.227 − 66 =
  40. 40.334 − 96 =

Answer key

  1. 275
  2. 482
  3. 70
  4. 376
  5. 377
  6. 231
  7. 380
  8. 486
  9. 85
  10. 87
  11. 241
  12. 297
  13. 185
  14. 69
  15. 3
  16. 165
  17. 154
  18. 483
  19. 10
  20. 515
  21. 108
  22. 64
  23. 149
  24. 87
  25. 24
  26. 110
  27. 257
  28. 39
  29. 492
  30. 61
  31. 89
  32. 173
  33. 449
  34. 395
  35. 115
  36. 31
  37. 89
  38. 487
  39. 161
  40. 238

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