$$ Making Change $$

We learned how to make change two different ways.  We can count up from the cost to the given amount or we can subtract the cost from the amount given. Here is a link to to making change.
 http://www.mathplayground.com/making_change.html
  Example:
                                                                           
Carlos paid $5 for a hamburger that cost $3.25.

              Q            Q          Q          $1
 $3.25, $3.50,  $3.75,   $4.00,   $5.00 

so the change back would be   $1.75  ($1 and 3Q)

          $5.00
           -3.25
           $1.75  change back is $1 and 3Q.

The goal is to find the change back with the least amount of coins.
  (not 75 pennies  or 70 dimes and 5 pennies)