"SI उपसर्ग": अवतरणों में अंतर

The prefix always takes precedence over any exponentiation; thus "km²" means ''square kilometre'' and not ''kilo–square metre''. For example, 3 km² is equal to 3 000 000 m² and ''not'' to 3000 m² (''nor'' to 9 000 000 m²). Thus the SI prefixes provide steps of a factor one million instead of one thousand in the case of an exponent 2, of a thousand million in the case of an exponent 3, etc. As a result large numbers may be needed, even if the prefixes are fully used, or intermediate units (like the [[litre]]) are introduced.

 

 

 

The prefix ''kilo'' derives from the [[Greek language|Greek]] word ''χίλια'' (''khilia'' or ''chilia'') = thousand.