Lesson 5 - Subtracting Fractions

  
          


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Subtracting fractions can only be performed when the denominators are the same.  The easiest fractions to subtract are the ones that start with the same denominators.  These are called, like fractions.

Subtracting like fractions only involve the numerators.  To solve, simply look at the numerators and subtract.  NEVER subtract the denominators.
   

For example: 


 

Subtracting unlike fractions, fractions with different denominators, require more work.  

For example:

 

  
  
First, find a common denominator.
  
Next, subtract the numerators and
reduce if necessary.
   
  

Another example:


  
First, find a common denominator. frac_sb5.gif (1262 bytes)
  
Next, subtract the numerators and
reduce if necessary.		   frac_sb6.gif (1286 bytes)
  
  Need some practice?  

  

Extension Activities - Subtracting Fractions

  

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