The small 2 in CO2 is called a "subscript" In the Editor here at Answers.com (and many other text editors) you select the 2 and press the [ x2 ] button (fifth from the left on the toolbar above the text editing field).
Note that if you do that at the end of a line, when you start writhing the next word all those will be subscript too, it is a toggle so just select the letters/numbers that shouldn't be subscript and pres the button again.
This goes for "superscript" too: x2
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The answer is simple it's one/1
Large Number & Small Number are Difficult to Write and Read,So a Method For Writing and Reading them More Easily This Calle Scientific notation ,To Computation make easy! :)))
0.0000000000000000000000000000000000001 is a very small decimal number. ^^
You click the superscript button. There's even one right here. Looks like this: x2
No matter how big a number is, we can always add one or multiply by two or more. No matter how small a number is, we can always divide it by two or take away a given percentage of it. No matter how small a negative number is, we can always make it smaller! Math knows no limits. Math has no boundaries. The limitations in math and numbers are only those of practicality and imagination