These are all prefixes to root words. Mega = 1000000, kilo = 1000, milli = .0001, micro = .0000001
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Mega, kilo, milli, and micro are prefixes used in the metric system to denote multiples or fractions of a base unit. Mega represents one million, kilo represents one thousand, milli represents one thousandth, and micro represents one millionth.
The metric units between milli and micro are centi (0.01) and deci (0.1).
Factor Name Symbol1024 yotta Y1021 zetta Z1018 exa E1015 peta P1012 tera T109 giga G106 mega M103 kilo k102 hecto h101 deca da10-1 deci d10-2 centi c10-3 milli m10-6 micro µ10-9 nano n10-12 pico p10-15 femto f10-18 atto a10-21 zepto z10-24 yocto y
It goes like this: kilo, mega, giga. We use kilo for 103, mega for 106 and giga for 109.
The main ones are: Micro = one millionth Milli = one thousandth Centi = one hundredth Kilo = thousands Mega = millions Nano has become of large importance to technology as of late. This is 10-9 For other prefices follow the link below.
Some common electrical prefixes include milli- (m), which represents one thousandth (10^-3), micro- (μ) for one millionth (10^-6), kilo- (k) for one thousand (10^3), and mega- (M) for one million (10^6). These prefixes are used to express different orders of magnitude in electrical measurements.