C++ :

#include<bits/stdc++.h>
using namespace std;
int main()
{
	cout<<"   8.5"<<endl;
	cout<<"+  2.5"<<endl;
	cout<<"------"<<endl;
	cout<<"  11.0"<<endl;
	return 0;
}

Pascal :

Var  x1,x2,s:real;
Begin
     X1:=8.5; X2:=2.5;
     S:=x1+x2;
     writeln(x1:6:1);
     writeln('+',x2:5:1);
     writeln('------');
     writeln(s:6:1);
end.