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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 848 · 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. 1.118 − 96 =
  2. 2.286 − 77 =
  3. 3.495 − 99 =
  4. 4.256 − 18 =
  5. 5.152 − 98 =
  6. 6.292 − 48 =
  7. 7.72 − 17 =
  8. 8.527 − 26 =
  9. 9.490 − 66 =
  10. 10.159 − 76 =
  11. 11.328 − 86 =
  12. 12.160 − 46 =
  13. 13.155 − 99 =
  14. 14.450 − 17 =
  15. 15.171 − 57 =
  16. 16.572 − 79 =
  17. 17.89 − 78 =
  18. 18.588 − 19 =
  19. 19.79 − 56 =
  20. 20.110 − 56 =
  21. 21.372 − 36 =
  22. 22.63 − 27 =
  23. 23.373 − 96 =
  24. 24.566 − 29 =
  25. 25.208 − 99 =
  26. 26.82 − 28 =
  27. 27.409 − 99 =
  28. 28.287 − 36 =
  29. 29.431 − 16 =
  30. 30.186 − 18 =
  31. 31.98 − 86 =
  32. 32.153 − 26 =
  33. 33.218 − 36 =
  34. 34.107 − 16 =
  35. 35.414 − 79 =
  36. 36.281 − 27 =
  37. 37.152 − 39 =
  38. 38.476 − 19 =
  39. 39.70 − 29 =
  40. 40.261 − 36 =

Answer key

  1. 22
  2. 209
  3. 396
  4. 238
  5. 54
  6. 244
  7. 55
  8. 501
  9. 424
  10. 83
  11. 242
  12. 114
  13. 56
  14. 433
  15. 114
  16. 493
  17. 11
  18. 569
  19. 23
  20. 54
  21. 336
  22. 36
  23. 277
  24. 537
  25. 109
  26. 54
  27. 310
  28. 251
  29. 415
  30. 168
  31. 12
  32. 127
  33. 182
  34. 91
  35. 335
  36. 254
  37. 113
  38. 457
  39. 41
  40. 225

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