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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 967 · 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. 1.168 − 36 =
  2. 2.207 − 87 =
  3. 3.251 − 26 =
  4. 4.527 − 96 =
  5. 5.340 − 37 =
  6. 6.74 − 66 =
  7. 7.449 − 48 =
  8. 8.498 − 66 =
  9. 9.405 − 58 =
  10. 10.396 − 86 =
  11. 11.537 − 59 =
  12. 12.481 − 77 =
  13. 13.203 − 28 =
  14. 14.429 − 76 =
  15. 15.237 − 27 =
  16. 16.391 − 87 =
  17. 17.97 − 68 =
  18. 18.277 − 17 =
  19. 19.465 − 47 =
  20. 20.181 − 66 =
  21. 21.445 − 28 =
  22. 22.378 − 26 =
  23. 23.74 − 27 =
  24. 24.88 − 19 =
  25. 25.162 − 69 =
  26. 26.529 − 79 =
  27. 27.244 − 48 =
  28. 28.136 − 76 =
  29. 29.548 − 39 =
  30. 30.182 − 76 =
  31. 31.575 − 48 =
  32. 32.244 − 39 =
  33. 33.575 − 18 =
  34. 34.584 − 76 =
  35. 35.118 − 29 =
  36. 36.182 − 97 =
  37. 37.85 − 17 =
  38. 38.466 − 18 =
  39. 39.488 − 76 =
  40. 40.210 − 39 =

Answer key

  1. 132
  2. 120
  3. 225
  4. 431
  5. 303
  6. 8
  7. 401
  8. 432
  9. 347
  10. 310
  11. 478
  12. 404
  13. 175
  14. 353
  15. 210
  16. 304
  17. 29
  18. 260
  19. 418
  20. 115
  21. 417
  22. 352
  23. 47
  24. 69
  25. 93
  26. 450
  27. 196
  28. 60
  29. 509
  30. 106
  31. 527
  32. 205
  33. 557
  34. 508
  35. 89
  36. 85
  37. 68
  38. 448
  39. 412
  40. 171

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