title: How to add two lines of number from a file in bash shell scripting?
body: <p>I was trying to add the numbers from a file in shell and I am kinda stuck. I am new to bash and I dont know how to do it. 
  My file example is like this.</p>
  
  <p>cat temp</p>
  
  <p>23 49</p>
  
  <p>35 50</p>
  
  <p>what I want to do is to add 23 and 35 and to add 49 and 50. Any ideas will be helpful.</p>
  
  <p>Thanks.</p>