Maths

In maths we did adding decimals on a number line it go'es like this.  So I will show you how to do it, 
134.5-45.3=???? So lets find out first you turn it in to an addition.
 45.3+ _____=134.5
then make a number line.

                                                  


                         

     so then add it up so it equals to   89.2 .