Scientific Notation : In many disciplines of science and
engineering, very large and very small numerical quantities
must be managed. Some of these quantities are mind-boggling
in their size, either extremely small or extremely large.
Take for example the mass of a proton, one of the
constituent particles of an atom's nucleus:
Metric Prefixes : To express a quantity in a different metric
prefix that what it was originally given, all we need to do
is skip the decimal point to the right or to the left as
needed. Notice that the metric prefix "number line" in the
previous section was laid out from larger to smaller, right
to left. This layout was purposely chosen to make it easier
to remember which direction you need to skip the decimal
point for any given conversion.