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Converting 4,0004{,}000 and 0.0040.004 to Scientific Notation

To write a number in scientific notation, the decimal point is moved to create a first factor between 11 and 1010, and the number is multiplied by a power of 1010. For a number larger than 11, the power of 1010 is positive. For example, 4,0004{,}000 means 4imes1,0004 imes 1{,}000, which can be rewritten as 4imes1034 imes 10^3. The decimal point is moved 33 places to the left to get the first factor between 11 and 1010, making the exponent 33. For a number between 00 and 11, the power of 1010 is negative. For example, 0.0040.004 means 4imes11,0004 imes \frac{1}{1{,}000}, which can be rewritten as 4imes11034 imes \frac{1}{10^3} or 4imes1034 imes 10^{-3}. The decimal point is moved 33 places to the right to get the first factor between 11 and 1010, making the exponent 3-3.

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Updated 2026-04-29

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