Question 621305
<pre>
11 - 8 ÷ ({{{1/3}}} + {{{1/5}}})

Do in the parentheses first by writing {{{1/3}}} as {{{5/15}}} and {{{1/5}}} as {{{3/15}}}

11 - 8 ÷ ({{{5/15}}} + {{{3/15}}})

11 - 8 ÷ {{{8/15}}}

Next do the division by inverting the {{{8/15}}} as {{{15/8}}} and
changing the division to multiplication:

11 - 8×{{{15/8}}}

To do the multiplication, write 8 as {{{8/1}}}

11 - {{{8/1}}}×{{{15/8}}}

Cancel the 8's

11 - {{{cross(8)/1}}}×{{{15/cross(8)}}}

11 - 15

   -4

Edwin</pre>