Question 1108565
could you guys give me a example for adding and subtracting fractions for pre algebra please 
==================
{{{1/3 + 1/5 = 5/15 + 3/15 = 8/15}}}
{{{1/2 - 1/7 = 7/14 - 2/14 = 5/14}}}
----------
{{{1/a + 1/b = b/(ab) + a/(ab) = (a+b)/ab}}}