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Metric Prefixes for SI Units . Prefix Symbol Meaning ; deci: d: 10-1 centi: c 10-2 milli: m 10-3 micro:
This table of metric prefixes has the standard names for each prefix used in science and measurements. It also shows the symbol used to represent these prefixes, their ‘power of ten’ and the number you are actually replacing with the prefix.
In the SI, designations of multiples and subdivision of any unit may be arrived at by combining with the name of the unit the prefixes deka, hecto, and kilo meaning, respectively, 10, 100, and 1000, and deci, centi, and milli, meaning, respectively, one-tenth, one-hundredth, and one-thousandth.
Table of metric system prefixes, symbols, and multiplication factors. The metric system defines prefixes and corresponding symbols for positive and negative powers of 10, as applied to each unit of measure.
Prefixes corresponding to an integer power of one thousand are generally preferred; the prefixes corresponding to tens (deci-, deca-) and hundreds (centi-, hecto-) are less common and are disfavoured in certain fields. Hence, 100 m is preferred over 1 hm (hectometre) or 10 dam (decametres).
The SI prefixes are the 20 power-of-10 prefixes specified by the Bureau International des Poids et Mesures (BIPM) for use in the International System of Units (SI). They are summarized in the table below, using the American spelling 'deka' instead of 'deca,' and specified by NIST Special Publication SP811 (Thompson and Taylor 2008, p. iv).
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