One half plus one third equals five sixths or about .8333333.
"What is four and a half plus three and five sixths": Eight and one third (8 1/3)
One quart plus one half pint, two pints and one half pint or five half pints.
one and two sixth's
one half plus one half equals 4/4ths or one whole
One and one eighteenth: 11/18
google it or bing it