This
one of several cool little documents I used when
teaching math. I was also the de facto computer teacher for the middle
grades and they came in handy there too. The other documents are also posted
on the home page of the For Teachers section.
This chart is a great visual reference
combining and comparing numbers in exponential form, standard form, decimals and
words. It ties in nicely with the other documents. It exposes students to
unfamiliar terms and concepts, such as negative exponents and the word form of
amazingly large and small numbers.
Like the others, I'm not sure where I
got them but they have been useful over the years.
Note the numbers in the
"Since" column, which get more recent as the numbers get bigger and smaller.
If you're wondering where those weird prefixes come from, see the
Origin of units
page.
1000^{m} 
10^{n} 
Prefix 
Symbol 
Since 
Word form 
Decimal 
1000^{8} 
10^{24} 
yotta 
Y 
1991 
Septillion 
1000000000000000000000000 
1000^{7} 
10^{21} 
zetta 
Z 
1991 
Sextillion 
1000000000000000000000 
1000^{6} 
10^{18} 
exa 
E 
1975 
Quintillion 
1000000000000000000 
1000^{5} 
10^{15} 
peta 
P 
1975 
Quadrillion 
1000000000000000 
1000^{4} 
10^{12} 
tera 
T 
1960 
Trillion 
1000000000000 
1000^{3} 
10^{9} 
giga 
G 
1960 
Billion 
1000000000 
1000^{2} 
10^{6} 
mega 
M 
1960 
Million 
1000000 
1000^{1} 
10^{3} 
kilo 
k 
1795 
Thousand 
1000 
1000^{2⁄3} 
10^{2} 
hecto 
h 
1795 
Hundred 
100 
1000^{1⁄3} 
10^{1} 
deca 
da 
1795 
Ten 
10 
1000^{0} 
10^{0} 
(none) 
(none) 
NA 
One 
1 
1000^{−1⁄3} 
10^{−1} 
deci 
d 
1795 
Tenth 
0.1 
1000^{−2⁄3} 
10^{−2} 
centi 
c 
1795 
Hundredth 
0.01 
1000^{−1} 
10^{−3} 
milli 
m 
1795 
Thousandth 
0.001 
1000^{−2} 
10^{−6} 
micro 
µ 
1960 
Millionth 
0.000001 
1000^{−3} 
10^{−9} 
nano 
n 
1960 
Billionth 
0.000000001 
1000^{−4} 
10^{−12} 
pico 
p 
1960 
Trillionth 
0.000000000001 
1000^{−5} 
10^{−15} 
femto 
f 
1964 
Quadrillionth 
0.000000000000001 
1000^{−6} 
10^{−18} 
atto 
a 
1964 
Quintillionth 
0.000000000000000001 
1000^{−7} 
10^{−21} 
zepto 
z 
1991 
Sextillionth 
0.000000000000000000001 
1000^{−8} 
10^{−24} 
yocto 
y 
1991 
Septillionth 
0.000000000000000000000001 
