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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 764 · 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. 1.335 − 98 =
  2. 2.447 − 18 =
  3. 3.188 − 98 =
  4. 4.230 − 28 =
  5. 5.531 − 67 =
  6. 6.122 − 18 =
  7. 7.361 − 16 =
  8. 8.148 − 48 =
  9. 9.288 − 59 =
  10. 10.75 − 37 =
  11. 11.92 − 88 =
  12. 12.307 − 57 =
  13. 13.266 − 78 =
  14. 14.593 − 48 =
  15. 15.104 − 89 =
  16. 16.71 − 16 =
  17. 17.584 − 76 =
  18. 18.135 − 26 =
  19. 19.162 − 66 =
  20. 20.175 − 19 =
  21. 21.172 − 48 =
  22. 22.167 − 27 =
  23. 23.195 − 66 =
  24. 24.498 − 76 =
  25. 25.208 − 27 =
  26. 26.74 − 27 =
  27. 27.586 − 17 =
  28. 28.365 − 47 =
  29. 29.550 − 39 =
  30. 30.410 − 79 =
  31. 31.98 − 66 =
  32. 32.271 − 17 =
  33. 33.504 − 17 =
  34. 34.496 − 88 =
  35. 35.163 − 88 =
  36. 36.290 − 86 =
  37. 37.241 − 36 =
  38. 38.97 − 96 =
  39. 39.381 − 66 =
  40. 40.459 − 26 =

Answer key

  1. 237
  2. 429
  3. 90
  4. 202
  5. 464
  6. 104
  7. 345
  8. 100
  9. 229
  10. 38
  11. 4
  12. 250
  13. 188
  14. 545
  15. 15
  16. 55
  17. 508
  18. 109
  19. 96
  20. 156
  21. 124
  22. 140
  23. 129
  24. 422
  25. 181
  26. 47
  27. 569
  28. 318
  29. 511
  30. 331
  31. 32
  32. 254
  33. 487
  34. 408
  35. 75
  36. 204
  37. 205
  38. 1
  39. 315
  40. 433

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