![]() ![]() For instance, since the prefix kilo (k) stands for 1000, 1 kilometre (km) equals 1000 metres (m), and any change from metres to kilometres or vice versa simply involves a decimal point or zeros as shown below. ![]() This results from the practical system of attaching to unit names (symbols) standard prefixes that stand for some of the powers of 10 such as 0.001 (milli), 1000 (kilo). One of the main reasons for this is the simple compatibility of the metric system with our world-wide numerals and arithmetic based on the 10 digits and their position relative to a decimal point. The metric system, and especially that part of it called the SI (le Systéme International d'Unités or, in plain English, the International System of Units), is by far the simplest and most rational system of units devised. Units and formulas Metric system, symbols & units ![]()
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