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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 935 · 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. 1.419 − 86 =
  2. 2.252 − 96 =
  3. 3.146 − 36 =
  4. 4.182 − 16 =
  5. 5.566 − 66 =
  6. 6.137 − 97 =
  7. 7.124 − 57 =
  8. 8.457 − 97 =
  9. 9.227 − 59 =
  10. 10.366 − 99 =
  11. 11.527 − 87 =
  12. 12.438 − 49 =
  13. 13.121 − 88 =
  14. 14.157 − 37 =
  15. 15.132 − 58 =
  16. 16.488 − 38 =
  17. 17.216 − 56 =
  18. 18.444 − 79 =
  19. 19.389 − 97 =
  20. 20.270 − 86 =
  21. 21.504 − 66 =
  22. 22.150 − 58 =
  23. 23.126 − 76 =
  24. 24.298 − 38 =
  25. 25.302 − 89 =
  26. 26.458 − 67 =
  27. 27.199 − 26 =
  28. 28.490 − 16 =
  29. 29.340 − 86 =
  30. 30.562 − 66 =
  31. 31.153 − 39 =
  32. 32.514 − 66 =
  33. 33.120 − 17 =
  34. 34.146 − 36 =
  35. 35.168 − 78 =
  36. 36.507 − 48 =
  37. 37.83 − 48 =
  38. 38.334 − 19 =
  39. 39.155 − 99 =
  40. 40.64 − 59 =

Answer key

  1. 333
  2. 156
  3. 110
  4. 166
  5. 500
  6. 40
  7. 67
  8. 360
  9. 168
  10. 267
  11. 440
  12. 389
  13. 33
  14. 120
  15. 74
  16. 450
  17. 160
  18. 365
  19. 292
  20. 184
  21. 438
  22. 92
  23. 50
  24. 260
  25. 213
  26. 391
  27. 173
  28. 474
  29. 254
  30. 496
  31. 114
  32. 448
  33. 103
  34. 110
  35. 90
  36. 459
  37. 35
  38. 315
  39. 56
  40. 5

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