Scientific notation has exactly one non-zero digit to the left of the decimal point in the mantissa. The numbers listed above do not.
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<em>Comment on these numbers</em>
There may be good reasons for writing the numbers in this form. For example, in engineering, it is often useful to have the exponent be a multiple of 3. In other instances, writing the number in these forms may facilitate arithmetic. However good the reasons may be, these numbers are <em>not</em> in in the form defined as "scientific notation."
