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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 16 · 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. 1.178 − 37 =
  2. 2.211 − 47 =
  3. 3.416 − 47 =
  4. 4.359 − 18 =
  5. 5.438 − 86 =
  6. 6.166 − 16 =
  7. 7.58 − 36 =
  8. 8.554 − 37 =
  9. 9.226 − 88 =
  10. 10.131 − 78 =
  11. 11.241 − 79 =
  12. 12.277 − 57 =
  13. 13.61 − 28 =
  14. 14.402 − 16 =
  15. 15.176 − 76 =
  16. 16.542 − 29 =
  17. 17.162 − 96 =
  18. 18.494 − 97 =
  19. 19.225 − 28 =
  20. 20.380 − 68 =
  21. 21.233 − 68 =
  22. 22.135 − 19 =
  23. 23.562 − 18 =
  24. 24.373 − 38 =
  25. 25.168 − 97 =
  26. 26.272 − 59 =
  27. 27.308 − 97 =
  28. 28.137 − 29 =
  29. 29.321 − 39 =
  30. 30.130 − 97 =
  31. 31.219 − 57 =
  32. 32.223 − 77 =
  33. 33.74 − 49 =
  34. 34.315 − 79 =
  35. 35.97 − 56 =
  36. 36.452 − 67 =
  37. 37.248 − 27 =
  38. 38.318 − 46 =
  39. 39.466 − 27 =
  40. 40.333 − 96 =

Answer key

  1. 141
  2. 164
  3. 369
  4. 341
  5. 352
  6. 150
  7. 22
  8. 517
  9. 138
  10. 53
  11. 162
  12. 220
  13. 33
  14. 386
  15. 100
  16. 513
  17. 66
  18. 397
  19. 197
  20. 312
  21. 165
  22. 116
  23. 544
  24. 335
  25. 71
  26. 213
  27. 211
  28. 108
  29. 282
  30. 33
  31. 162
  32. 146
  33. 25
  34. 236
  35. 41
  36. 385
  37. 221
  38. 272
  39. 439
  40. 237

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