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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 197 · 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. 1.88 − 26 =
  2. 2.100 − 86 =
  3. 3.584 − 26 =
  4. 4.544 − 78 =
  5. 5.76 − 17 =
  6. 6.334 − 36 =
  7. 7.180 − 29 =
  8. 8.301 − 88 =
  9. 9.422 − 17 =
  10. 10.440 − 96 =
  11. 11.588 − 36 =
  12. 12.289 − 18 =
  13. 13.162 − 88 =
  14. 14.261 − 66 =
  15. 15.478 − 89 =
  16. 16.234 − 88 =
  17. 17.527 − 88 =
  18. 18.505 − 66 =
  19. 19.423 − 97 =
  20. 20.55 − 37 =
  21. 21.292 − 19 =
  22. 22.396 − 88 =
  23. 23.240 − 26 =
  24. 24.201 − 66 =
  25. 25.283 − 69 =
  26. 26.184 − 39 =
  27. 27.461 − 86 =
  28. 28.240 − 39 =
  29. 29.424 − 39 =
  30. 30.99 − 49 =
  31. 31.462 − 78 =
  32. 32.173 − 36 =
  33. 33.480 − 47 =
  34. 34.573 − 57 =
  35. 35.270 − 26 =
  36. 36.294 − 88 =
  37. 37.151 − 99 =
  38. 38.196 − 26 =
  39. 39.95 − 87 =
  40. 40.528 − 77 =

Answer key

  1. 62
  2. 14
  3. 558
  4. 466
  5. 59
  6. 298
  7. 151
  8. 213
  9. 405
  10. 344
  11. 552
  12. 271
  13. 74
  14. 195
  15. 389
  16. 146
  17. 439
  18. 439
  19. 326
  20. 18
  21. 273
  22. 308
  23. 214
  24. 135
  25. 214
  26. 145
  27. 375
  28. 201
  29. 385
  30. 50
  31. 384
  32. 137
  33. 433
  34. 516
  35. 244
  36. 206
  37. 52
  38. 170
  39. 8
  40. 451

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