1.

Find the value of \[\left[ -\frac{1}{4}-\left( -\frac{1}{6} \right) \right]+\left[ \frac{1}{3}+\left( -\frac{1}{2} \right) \right]\].

A.  \[\frac{1}{2}\]                       
B.  \[\frac{-1}{4}\]        
C.       \[\frac{1}{3}\]                       
D.       \[\frac{-1}{6}\]                     
Answer» C.       \[\frac{1}{3}\]                       


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