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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 732 · 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. 1.217 − 48 =
  2. 2.90 − 78 =
  3. 3.231 − 59 =
  4. 4.139 − 79 =
  5. 5.225 − 86 =
  6. 6.196 − 48 =
  7. 7.579 − 27 =
  8. 8.198 − 76 =
  9. 9.209 − 56 =
  10. 10.113 − 27 =
  11. 11.436 − 29 =
  12. 12.337 − 16 =
  13. 13.348 − 48 =
  14. 14.287 − 96 =
  15. 15.267 − 56 =
  16. 16.554 − 37 =
  17. 17.272 − 68 =
  18. 18.475 − 58 =
  19. 19.245 − 16 =
  20. 20.114 − 26 =
  21. 21.120 − 56 =
  22. 22.596 − 59 =
  23. 23.137 − 36 =
  24. 24.582 − 46 =
  25. 25.558 − 76 =
  26. 26.76 − 28 =
  27. 27.460 − 39 =
  28. 28.566 − 76 =
  29. 29.334 − 56 =
  30. 30.471 − 58 =
  31. 31.200 − 38 =
  32. 32.123 − 76 =
  33. 33.430 − 97 =
  34. 34.188 − 18 =
  35. 35.190 − 47 =
  36. 36.152 − 47 =
  37. 37.59 − 18 =
  38. 38.153 − 99 =
  39. 39.83 − 36 =
  40. 40.532 − 48 =

Answer key

  1. 169
  2. 12
  3. 172
  4. 60
  5. 139
  6. 148
  7. 552
  8. 122
  9. 153
  10. 86
  11. 407
  12. 321
  13. 300
  14. 191
  15. 211
  16. 517
  17. 204
  18. 417
  19. 229
  20. 88
  21. 64
  22. 537
  23. 101
  24. 536
  25. 482
  26. 48
  27. 421
  28. 490
  29. 278
  30. 413
  31. 162
  32. 47
  33. 333
  34. 170
  35. 143
  36. 105
  37. 41
  38. 54
  39. 47
  40. 484

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