Adding and Subtracting Rational (Fractional) Expressions Fractions are fractions!It doesn't matter if the fractions are made up of numbers, or of algebraic variables, the rules are the same!The Basic RULE for Adding and Subtracting Fractions:Get a Common Denominator!Examine the basic process:Add: 1/3+1/4You CANNOT reduce (cancel) those 3's!!!!Get a … [Read more...] about Adding and Subtracting Rational (Fractional) Expressions