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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 609 · 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. 1.227 − 19 =
  2. 2.199 − 96 =
  3. 3.139 − 26 =
  4. 4.411 − 96 =
  5. 5.147 − 86 =
  6. 6.572 − 36 =
  7. 7.556 − 56 =
  8. 8.487 − 39 =
  9. 9.427 − 69 =
  10. 10.137 − 68 =
  11. 11.204 − 16 =
  12. 12.428 − 58 =
  13. 13.367 − 76 =
  14. 14.122 − 96 =
  15. 15.146 − 87 =
  16. 16.175 − 79 =
  17. 17.408 − 16 =
  18. 18.556 − 38 =
  19. 19.120 − 39 =
  20. 20.218 − 16 =
  21. 21.229 − 16 =
  22. 22.191 − 86 =
  23. 23.454 − 16 =
  24. 24.310 − 96 =
  25. 25.183 − 19 =
  26. 26.186 − 96 =
  27. 27.321 − 87 =
  28. 28.444 − 88 =
  29. 29.115 − 79 =
  30. 30.153 − 39 =
  31. 31.573 − 66 =
  32. 32.471 − 27 =
  33. 33.219 − 66 =
  34. 34.571 − 39 =
  35. 35.82 − 66 =
  36. 36.255 − 46 =
  37. 37.307 − 98 =
  38. 38.251 − 18 =
  39. 39.431 − 19 =
  40. 40.283 − 38 =

Answer key

  1. 208
  2. 103
  3. 113
  4. 315
  5. 61
  6. 536
  7. 500
  8. 448
  9. 358
  10. 69
  11. 188
  12. 370
  13. 291
  14. 26
  15. 59
  16. 96
  17. 392
  18. 518
  19. 81
  20. 202
  21. 213
  22. 105
  23. 438
  24. 214
  25. 164
  26. 90
  27. 234
  28. 356
  29. 36
  30. 114
  31. 507
  32. 444
  33. 153
  34. 532
  35. 16
  36. 209
  37. 209
  38. 233
  39. 412
  40. 245

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