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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 746 · 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. 1.298 − 78 =
  2. 2.170 − 36 =
  3. 3.366 − 77 =
  4. 4.590 − 16 =
  5. 5.196 − 58 =
  6. 6.589 − 69 =
  7. 7.472 − 97 =
  8. 8.367 − 16 =
  9. 9.213 − 26 =
  10. 10.134 − 76 =
  11. 11.366 − 97 =
  12. 12.581 − 57 =
  13. 13.159 − 68 =
  14. 14.568 − 96 =
  15. 15.206 − 28 =
  16. 16.393 − 66 =
  17. 17.148 − 67 =
  18. 18.373 − 26 =
  19. 19.152 − 98 =
  20. 20.300 − 96 =
  21. 21.147 − 76 =
  22. 22.273 − 89 =
  23. 23.223 − 19 =
  24. 24.319 − 16 =
  25. 25.158 − 99 =
  26. 26.174 − 96 =
  27. 27.118 − 97 =
  28. 28.155 − 38 =
  29. 29.163 − 58 =
  30. 30.141 − 26 =
  31. 31.154 − 66 =
  32. 32.113 − 66 =
  33. 33.146 − 87 =
  34. 34.153 − 39 =
  35. 35.97 − 36 =
  36. 36.598 − 98 =
  37. 37.85 − 79 =
  38. 38.540 − 78 =
  39. 39.292 − 59 =
  40. 40.437 − 67 =

Answer key

  1. 220
  2. 134
  3. 289
  4. 574
  5. 138
  6. 520
  7. 375
  8. 351
  9. 187
  10. 58
  11. 269
  12. 524
  13. 91
  14. 472
  15. 178
  16. 327
  17. 81
  18. 347
  19. 54
  20. 204
  21. 71
  22. 184
  23. 204
  24. 303
  25. 59
  26. 78
  27. 21
  28. 117
  29. 105
  30. 115
  31. 88
  32. 47
  33. 59
  34. 114
  35. 61
  36. 500
  37. 6
  38. 462
  39. 233
  40. 370

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