Question 175707
{{{3&1/4 + 2&1/8 - 1&1/2 + 5/8}}}
<pre><font size = 4 color="indigo"><b>
First we add the three positive ones:

{{{matrix(4,1,3&1/4, 2&1/8, 5/8,"------")}}}

The least common denominator is 8, so

{{{matrix(5,5,3&1/4,"=",3&2/8,"","",
              2&1/8,"=",2&1/8,"","",
                5/8,"=",5/8,"","",
              "------","","------","","",
                "", "",5&8/8, "=", 6)}}}

Now we subtract the {{{1&1/2}}} from the {{{6}}}

{{{matrix(3,1,6, 
              -1&1/2,
             "------")}}}

Write the {{{6}}} as {{{5&2/2}}}

{{{matrix(4,3,6, "=", 5&2/2,
              -1&1/2, "=", -1&1/2,
             "------","","------",
"","",4&1/2)}}}

Edwin</pre>