EXPONENTSExponential notation is a convenient way of expressing numbers as it is a way of abbreviating a large number. In exponential notation the exponent (written as a small superscript number) simply indicates the number of times the number that has the exponent must be multiplied by itself.
Exponential notation is commonly used to write numbers with a large number of 0’s. In this case, the base (the number that has the exponent) is 10. So:10^{2} is ten x ten or 100 so: 10^{2} is 1/(ten x ten) or .01
Powers of ten

Number 
Name 
Exponential notation 
Common abbreviation 
1/1,000,000,000 
one billionth 
10^{9} 
nano.. 
1/1,000,000 
one millionth 
10^{6} 
micro.. 
1/1,000 
one thousandth 
10^{3} 
milli… 
1/100 
one hundredth 
10^{2} 
centi… 
1/10 
one tenth 
10^{1} 
deci… 
1 
one 
10^{0 **} 

10 
ten 
10^{1} 
deca.. 
100 
one hundred 
10^{2} 

1,000 
one thousand 
10^{3} 
kilo.. 
1,000,000 
one million 
10^{6} 
mega.. 
1,000,000,000 
one billion 
10^{9} 
giga.. 
^{**} Any number raised to the 0 power is defined as = to 1. A convenient feature of exponents used in calculations is that during multiplication exponents are added. So, if you wish to multiply 2^{2} x 2^{3}, the answer is 2^{5}. For 10^{1} x 10^{3} the answer is 10^{4}. Similarly during division, exponents are subtracted. So 100/10 = 10^{2}/10^{1} = 10^{1} = 10. 