<PRE><B>Question 367568</B>
Change the mixed numbers to fractions,
{{{6+2/9=54/9+2/9=56/9}}}
{{{1+3/4=4/4+3/4=7/4}}}
{{{3+5/6=18/6+5/6=23/6}}}
Then frind a commond denominator between 9, 4, and 6. 
36 is one.
{{{(57/9)(4/4)=224/36}}}
{{{(7/4)(9/9)=63/36}}}
{{{(23/6)(6/6)=138/36}}}
.
.
{{{6+2/9+1+3/4-(3+5/6)=224/36+63/36-138/36}}}
{{{6+2/9+1+3/4-(3+5/6)=(224+63-138)/36}}}
{{{6+2/9+1+3/4-(3+5/6)=149/36}}}
{{{6+2/9+1+3/4-(3+5/6)=4+5/36}}}</PRE>