Question 698960
if you have
{{{5}}} and {{{8/9}}} it will be {{{5+8/9=45/9+8/9=53/9}}}     
  
{{{5}}} and {{{7/10}}} it will be {{{5+7/10=50/10+7/10=57/10}}}

{{{4}}} and {{{13/40}}} it will be {{{4+13/40=160/40+13/40=173/40}}}     
     

{{{drawing( 600, 600, -10, 10, -10, 10,
  
  locate( -5, 10, number_line( 600, -5, 10, 53/9, 57/10,173/40 ) ))}}}