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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 750 · 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. 1.303 − 96 =
  2. 2.487 − 67 =
  3. 3.552 − 19 =
  4. 4.501 − 76 =
  5. 5.497 − 58 =
  6. 6.227 − 77 =
  7. 7.450 − 49 =
  8. 8.361 − 66 =
  9. 9.70 − 47 =
  10. 10.560 − 99 =
  11. 11.120 − 36 =
  12. 12.366 − 19 =
  13. 13.331 − 29 =
  14. 14.183 − 89 =
  15. 15.250 − 28 =
  16. 16.584 − 38 =
  17. 17.500 − 27 =
  18. 18.374 − 77 =
  19. 19.218 − 59 =
  20. 20.213 − 56 =
  21. 21.597 − 47 =
  22. 22.394 − 96 =
  23. 23.312 − 29 =
  24. 24.183 − 87 =
  25. 25.255 − 47 =
  26. 26.127 − 78 =
  27. 27.369 − 48 =
  28. 28.99 − 97 =
  29. 29.287 − 19 =
  30. 30.370 − 17 =
  31. 31.433 − 38 =
  32. 32.546 − 67 =
  33. 33.485 − 26 =
  34. 34.164 − 68 =
  35. 35.304 − 58 =
  36. 36.445 − 26 =
  37. 37.373 − 79 =
  38. 38.170 − 86 =
  39. 39.246 − 27 =
  40. 40.121 − 46 =

Answer key

  1. 207
  2. 420
  3. 533
  4. 425
  5. 439
  6. 150
  7. 401
  8. 295
  9. 23
  10. 461
  11. 84
  12. 347
  13. 302
  14. 94
  15. 222
  16. 546
  17. 473
  18. 297
  19. 159
  20. 157
  21. 550
  22. 298
  23. 283
  24. 96
  25. 208
  26. 49
  27. 321
  28. 2
  29. 268
  30. 353
  31. 395
  32. 479
  33. 459
  34. 96
  35. 246
  36. 419
  37. 294
  38. 84
  39. 219
  40. 75

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