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:
- Move the decimal point so that the first factor is greater than or equal to but less than .
- Count the number of decimal places, , that the decimal point was moved.
- Write the number as a product with a power of :
- If the original number is greater than , the power of will be (positive exponent).
- If the original number is between and , the power of will be (negative exponent).
- Check that the result makes sense by verifying that multiplying the first factor by the power of 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 ) yields a positive exponent, while moving it to the right (for numbers between and ) yields a negative exponent.
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