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One and a half
At the butcher's, you can buy one and a half ounces of liver sausage. You write it as the mixed fraction
and that is confusing. It is an addition, but there is no plus sign.
Explanation
Two and a half is written as
and actually means
It is one of the reasons why many people have problems with fractions. Because look at the multiplication
and that is all caused by a small dot.
Further details
When calculating two root a half
you don't even need a multiplication sign.