Scala Typing: How to Ensure Numeric Type -

I have a small problem in Scala with a typing case. In Haskell, I can do this:

  add :: (name) = & gt; (A, A) - & gt; (A, A) - & gt; (A, A)   
 In this way, I can put in any type of number and I support  +  etc. I want to do this for a Scala class like:  
  Case class numeracy [a & lt;: numeric] (x: A, y: a)   
 but this does not seem to work, but due to scala docs,  numeric [t]  is the only feature that allows for these functions, and  int ,  float  etc.  
 
 
  case class numpere [a]  numerical [ A])   
  numerical  example to itself  int ,  float , etc., but this is a fixed object Has been provided as. For a long explanation, see.