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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 149 · 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. 1.221 − 16 =
  2. 2.125 − 49 =
  3. 3.356 − 16 =
  4. 4.229 − 56 =
  5. 5.580 − 49 =
  6. 6.335 − 39 =
  7. 7.446 − 96 =
  8. 8.169 − 79 =
  9. 9.422 − 27 =
  10. 10.152 − 89 =
  11. 11.332 − 89 =
  12. 12.175 − 78 =
  13. 13.454 − 16 =
  14. 14.107 − 29 =
  15. 15.232 − 66 =
  16. 16.413 − 39 =
  17. 17.415 − 46 =
  18. 18.311 − 99 =
  19. 19.253 − 16 =
  20. 20.330 − 48 =
  21. 21.174 − 17 =
  22. 22.89 − 57 =
  23. 23.544 − 69 =
  24. 24.123 − 36 =
  25. 25.168 − 97 =
  26. 26.66 − 39 =
  27. 27.328 − 48 =
  28. 28.326 − 97 =
  29. 29.134 − 17 =
  30. 30.476 − 37 =
  31. 31.161 − 89 =
  32. 32.138 − 67 =
  33. 33.346 − 19 =
  34. 34.436 − 66 =
  35. 35.179 − 56 =
  36. 36.171 − 17 =
  37. 37.211 − 39 =
  38. 38.393 − 36 =
  39. 39.429 − 56 =
  40. 40.530 − 47 =

Answer key

  1. 205
  2. 76
  3. 340
  4. 173
  5. 531
  6. 296
  7. 350
  8. 90
  9. 395
  10. 63
  11. 243
  12. 97
  13. 438
  14. 78
  15. 166
  16. 374
  17. 369
  18. 212
  19. 237
  20. 282
  21. 157
  22. 32
  23. 475
  24. 87
  25. 71
  26. 27
  27. 280
  28. 229
  29. 117
  30. 439
  31. 72
  32. 71
  33. 327
  34. 370
  35. 123
  36. 154
  37. 172
  38. 357
  39. 373
  40. 483

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