18,02–19,5= JXUwMDc1JXUwMDFjJXUwMDFkJXUwMDE4JXUwMDBj
–205–(–20,5)=–205+ JXUwMDZhJXUwMDAyJXUwMDFjJXUwMDE5 = JXUwMDc1JXUwMDFjJXUwMDA5JXUwMDBjJXUwMDE4JXUwMDE5
–3,4–5,12= JXUwMDc1JXUwMDE1JXUwMDE0JXUwMDE5JXUwMDA3
24,3–(–27,25)= JXUwMDZhJXUwMDA2JXUwMDE4JXUwMDFm +27,25= JXUwMDZkJXUwMDA0JXUwMDFkJXUwMDE5JXUwMDAy