These implementations are for demonstration purposes. They are less efficient than the implementations in the Python standard library.

The same method is used for adding and subtracting numerical fractions or algebraic fractions. Find a common denominator Write each fraction as an equivalent fraction with that common denominator ...

The same method is used for adding / subtracting both numerical fractions and algebraic fractions. Find a common denominator Write each fraction as an equivalent fraction with the common denominator ...