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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 846 · 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. 1.548 − 88 =
  2. 2.420 − 47 =
  3. 3.501 − 29 =
  4. 4.406 − 47 =
  5. 5.595 − 47 =
  6. 6.461 − 19 =
  7. 7.422 − 36 =
  8. 8.531 − 57 =
  9. 9.436 − 19 =
  10. 10.209 − 37 =
  11. 11.301 − 36 =
  12. 12.362 − 66 =
  13. 13.485 − 68 =
  14. 14.178 − 76 =
  15. 15.596 − 36 =
  16. 16.448 − 29 =
  17. 17.472 − 96 =
  18. 18.310 − 27 =
  19. 19.151 − 46 =
  20. 20.183 − 87 =
  21. 21.501 − 29 =
  22. 22.431 − 86 =
  23. 23.546 − 16 =
  24. 24.505 − 16 =
  25. 25.387 − 16 =
  26. 26.433 − 88 =
  27. 27.421 − 57 =
  28. 28.324 − 16 =
  29. 29.261 − 69 =
  30. 30.537 − 97 =
  31. 31.105 − 36 =
  32. 32.501 − 99 =
  33. 33.226 − 66 =
  34. 34.538 − 96 =
  35. 35.427 − 76 =
  36. 36.548 − 78 =
  37. 37.376 − 47 =
  38. 38.129 − 68 =
  39. 39.561 − 68 =
  40. 40.348 − 48 =

Answer key

  1. 460
  2. 373
  3. 472
  4. 359
  5. 548
  6. 442
  7. 386
  8. 474
  9. 417
  10. 172
  11. 265
  12. 296
  13. 417
  14. 102
  15. 560
  16. 419
  17. 376
  18. 283
  19. 105
  20. 96
  21. 472
  22. 345
  23. 530
  24. 489
  25. 371
  26. 345
  27. 364
  28. 308
  29. 192
  30. 440
  31. 69
  32. 402
  33. 160
  34. 442
  35. 351
  36. 470
  37. 329
  38. 61
  39. 493
  40. 300

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