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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 1 · 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. 1.228 − 19 =
  2. 2.352 − 26 =
  3. 3.264 − 38 =
  4. 4.229 − 86 =
  5. 5.585 − 46 =
  6. 6.243 − 26 =
  7. 7.522 − 39 =
  8. 8.324 − 37 =
  9. 9.66 − 27 =
  10. 10.80 − 46 =
  11. 11.176 − 87 =
  12. 12.497 − 56 =
  13. 13.105 − 98 =
  14. 14.548 − 58 =
  15. 15.440 − 88 =
  16. 16.203 − 48 =
  17. 17.455 − 98 =
  18. 18.381 − 39 =
  19. 19.486 − 57 =
  20. 20.507 − 36 =
  21. 21.505 − 46 =
  22. 22.171 − 88 =
  23. 23.111 − 36 =
  24. 24.253 − 59 =
  25. 25.577 − 28 =
  26. 26.85 − 36 =
  27. 27.369 − 66 =
  28. 28.180 − 46 =
  29. 29.198 − 36 =
  30. 30.130 − 96 =
  31. 31.161 − 96 =
  32. 32.490 − 28 =
  33. 33.283 − 37 =
  34. 34.178 − 38 =
  35. 35.124 − 86 =
  36. 36.131 − 59 =
  37. 37.417 − 17 =
  38. 38.564 − 76 =
  39. 39.201 − 38 =
  40. 40.579 − 96 =

Answer key

  1. 209
  2. 326
  3. 226
  4. 143
  5. 539
  6. 217
  7. 483
  8. 287
  9. 39
  10. 34
  11. 89
  12. 441
  13. 7
  14. 490
  15. 352
  16. 155
  17. 357
  18. 342
  19. 429
  20. 471
  21. 459
  22. 83
  23. 75
  24. 194
  25. 549
  26. 49
  27. 303
  28. 134
  29. 162
  30. 34
  31. 65
  32. 462
  33. 246
  34. 140
  35. 38
  36. 72
  37. 400
  38. 488
  39. 163
  40. 483

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