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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 423 · 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. 1.270 − 66 =
  2. 2.149 − 76 =
  3. 3.554 − 76 =
  4. 4.342 − 67 =
  5. 5.539 − 46 =
  6. 6.425 − 79 =
  7. 7.257 − 16 =
  8. 8.300 − 48 =
  9. 9.312 − 88 =
  10. 10.411 − 49 =
  11. 11.269 − 96 =
  12. 12.155 − 76 =
  13. 13.399 − 29 =
  14. 14.544 − 56 =
  15. 15.544 − 88 =
  16. 16.308 − 79 =
  17. 17.567 − 66 =
  18. 18.363 − 99 =
  19. 19.289 − 46 =
  20. 20.343 − 87 =
  21. 21.118 − 39 =
  22. 22.471 − 78 =
  23. 23.185 − 28 =
  24. 24.465 − 29 =
  25. 25.436 − 39 =
  26. 26.119 − 77 =
  27. 27.307 − 56 =
  28. 28.169 − 66 =
  29. 29.90 − 29 =
  30. 30.181 − 69 =
  31. 31.212 − 38 =
  32. 32.154 − 79 =
  33. 33.158 − 16 =
  34. 34.137 − 59 =
  35. 35.166 − 99 =
  36. 36.388 − 77 =
  37. 37.141 − 27 =
  38. 38.92 − 19 =
  39. 39.105 − 57 =
  40. 40.440 − 26 =

Answer key

  1. 204
  2. 73
  3. 478
  4. 275
  5. 493
  6. 346
  7. 241
  8. 252
  9. 224
  10. 362
  11. 173
  12. 79
  13. 370
  14. 488
  15. 456
  16. 229
  17. 501
  18. 264
  19. 243
  20. 256
  21. 79
  22. 393
  23. 157
  24. 436
  25. 397
  26. 42
  27. 251
  28. 103
  29. 61
  30. 112
  31. 174
  32. 75
  33. 142
  34. 78
  35. 67
  36. 311
  37. 114
  38. 73
  39. 48
  40. 414

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