change 1 (global variable) to 1st

is there an easier way to do this?

Perhaps

initialize global theValue = 0

If dec_rows_number_one   = 2   

then

 theValue = join dec_rows_number_one 

                  nd

else if dec_rows_number_one   = 3 

 theValue = join dec_rows_number_one 

                  rd

else

 theValue = join dec_rows_number_one 

                  th

using what you might learn from here:  http://www.appinventor.org/Chapter18 

or you could do something like:  http://www.appinventor.org/Chapter20  

It depends on what your routine is supposed to do ultimately.

https://amerkashi.wordpress.com/2014/05/17/tipstricks-if-then-else-condition/

Yes there is.  See if above helps you out