Why is multiplication and division of rational expressions easier to calculate than addition and subtraction? When adding two rational numbers together What is the simplest way to find a common denominator of two fractions, even if it is not the least common denominator? If you don’t use the least common denominator when adding or subtracting rational numbers or expressions, what will you have to do to simplify your answer? Give an example of a relationship between x and y that is represented by a rational expression.

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