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4^-1 - 10^-1 =

 Aug 5, 2015

Best Answer 

 #1
avatar+99586 
+5

 

Remembering that a^-1  = 1/a     .... we have

 

4^-1   = 1/4

 

10^-1  = 1/10

 

So we have

 

1/4  - 1/10      and getting a common denominator of 20, we have

 

5/20  - 2/20  =  3/20

 

 

 Aug 5, 2015
 #1
avatar+99586 
+5
Best Answer

 

Remembering that a^-1  = 1/a     .... we have

 

4^-1   = 1/4

 

10^-1  = 1/10

 

So we have

 

1/4  - 1/10      and getting a common denominator of 20, we have

 

5/20  - 2/20  =  3/20

 

 

CPhill Aug 5, 2015

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