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Procedure for Converting from Decimal Notation to Scientific Notation

To convert a number from standard decimal notation into scientific notation, follow a four-step procedure:

  1. Move the decimal point so that the first factor is greater than or equal to 11 but less than 1010.
  2. Count the number of decimal places, nn, that the decimal point was moved.
  3. Write the number as a product with a power of 1010:
    • If the original number is greater than 11, the power of 1010 will be 10n10^n (positive exponent).
    • If the original number is between 00 and 11, the power of 1010 will be 10n10^{-n} (negative exponent).
  4. Check that the result makes sense by verifying that multiplying the first factor by the power of 1010 returns the original number.

The direction in which the decimal point moves determines the sign of the exponent: moving it to the left (for numbers greater than 11) yields a positive exponent, while moving it to the right (for numbers between 00 and 11) yields a negative exponent.

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Updated 2026-04-29

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