Difference between revisions of "Decimal"

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A '''decimal''', like a [[fraction]], is one way to express numbers less than 1. The main difference between a decimal and fraction is that a decimal is easier to utilize as it complements a whole number better. When a number is divided by a [[period]], anything to the right of the period is part of the decimal. This is illustrated in the following model;<blockquote>''(Whole Number/Integral Part)'''''.'''''(Decimal/Fractional Part)''</blockquote>
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A '''decimal''', like a [[fraction]], is one way to express numbers less than 1.  
  
As we have a base ten system, the first number to the right of the period represents the given number (''n'') out of ten (<sup>''n''</sup>'''/'''<sub>10</sub>), known as tenths. this can be used to find the value of any place, by multiplying the place to its left by <sup>1</sup>/<sub>10</sub> and substituting the given number for 1. Using the tenths example, this would be, 1 x <sup>1</sup>/<sub>10</sub>, to find the value of 0.1 . A simpler way of thinking about this that as we move right, each place gets ten times smaller.
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When writing decimals, a 0 is generally placed on the left side of the period.
 
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While not necessary in general usage, proper usage of zeros is essential in chemistry and physics where [[significant figures]] apply. A dash over the final digit indicates that the decimal continues infinitely, or without ending. Such cases are referred to as repeating decimals.   
When writing decimals without a whole number, a 0 is generally placed on the left side of the period to signify that the number is both a decimal and that there are no whole number components. While not necessary in general usage, proper usage of zeros is essential in chemistry and physics where [[significant figures]] apply. A dash over the final digit indicates that the decimal continues infinitely, or without ending. Such cases are referred to as repeating decimals.   
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===Resources===
 
===Resources===

Revision as of 06:45, 5 January 2009

A decimal, like a fraction, is one way to express numbers less than 1.

When writing decimals, a 0 is generally placed on the left side of the period. While not necessary in general usage, proper usage of zeros is essential in chemistry and physics where significant figures apply. A dash over the final digit indicates that the decimal continues infinitely, or without ending. Such cases are referred to as repeating decimals.

Resources