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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 932 · 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. 1.292 − 26 =
  2. 2.172 − 49 =
  3. 3.405 − 78 =
  4. 4.155 − 79 =
  5. 5.512 − 57 =
  6. 6.74 − 38 =
  7. 7.130 − 48 =
  8. 8.121 − 96 =
  9. 9.407 − 56 =
  10. 10.261 − 38 =
  11. 11.482 − 99 =
  12. 12.530 − 19 =
  13. 13.579 − 57 =
  14. 14.499 − 49 =
  15. 15.162 − 78 =
  16. 16.203 − 87 =
  17. 17.439 − 16 =
  18. 18.136 − 87 =
  19. 19.214 − 96 =
  20. 20.213 − 48 =
  21. 21.517 − 49 =
  22. 22.247 − 46 =
  23. 23.364 − 99 =
  24. 24.180 − 76 =
  25. 25.355 − 88 =
  26. 26.114 − 46 =
  27. 27.272 − 59 =
  28. 28.596 − 29 =
  29. 29.104 − 98 =
  30. 30.587 − 56 =
  31. 31.52 − 27 =
  32. 32.565 − 89 =
  33. 33.169 − 86 =
  34. 34.367 − 47 =
  35. 35.368 − 66 =
  36. 36.298 − 36 =
  37. 37.441 − 57 =
  38. 38.121 − 96 =
  39. 39.433 − 47 =
  40. 40.87 − 27 =

Answer key

  1. 266
  2. 123
  3. 327
  4. 76
  5. 455
  6. 36
  7. 82
  8. 25
  9. 351
  10. 223
  11. 383
  12. 511
  13. 522
  14. 450
  15. 84
  16. 116
  17. 423
  18. 49
  19. 118
  20. 165
  21. 468
  22. 201
  23. 265
  24. 104
  25. 267
  26. 68
  27. 213
  28. 567
  29. 6
  30. 531
  31. 25
  32. 476
  33. 83
  34. 320
  35. 302
  36. 262
  37. 384
  38. 25
  39. 386
  40. 60

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