Scale of numbers, deci, deca, centi, hecto etc..

Scale of numbers, deci, deca, centi, hecto etc..

Numbers

In the Metric system unwieldy small and large numbers can be represented using words. ie rather than saying 1000 metres or 1000 grammes you can say 1kilometre (kilo can be abbreviated to k and metre to m giving 1km) or 1kilogram (gram can be abbreviated to g giving 1kg).

Scales of numbers

Large Numbers

Number....................	Name	Symbol	Description (Short Scale)	Description (Long Scale)
1,000,000,000,000,000,000,000,000	yotta	Y	Septillion	Quadrillion
1,000,000,000,000,000,000,000	zetta	Z	Sextillion	Thousand Trillion/Trilliard
1,000,000,000,000,000,000	exa	E	Quintillion	Trillion
1,000,000,000,000,000	peta	P	Quadrillion	Thousand Billion/Billiard
1,000,000,000,000	tera	T	Trillion (조)	Billion
1,000,000,000	giga	G	Billion (십억)	Thousand Million/Milliard
1,000,000	mega	M	Million (백만)	Million
1,000	kilo	k	Thousand (천)	Thousand
100	hecto	h	Hundred (백)	Hundred
10	deca	da	Ten (십)	Ten>

Small Numbers

Number....................	Name	Symbol	Description (Short Scale)	Description (Long Scale)
0.1	deci	d	Tenth	Tenth
0.01	centi	c	Hundredth	Hundredth
0.001	milli	m	Thousandth	Thousandth
0.000 001	micro	u	Millionth	Millionth
0.000 000 001	nano	n	Billionth	Thousand Millionth
0.000 000 000 001	pico	p	Trillionth	Billionth
0.000 000 000 000 001	femto	f	Quadrillionth	Thousand Billionth
0.000 000 000 000 000 001	atto	a	Quitillionth	Trillionth
0.000 000 000 000 000 000 001	zepto	z	Sextillionth	Thousand Trillionth
0.000 000 000 000 000 000 000 001	yocto	y	Septillionth	Quadrillionth

Long and short scales idea suggested by Rob Riley (2012)