Adding And Subtracting Rational Expressions Worksheet. Adding and subtracting rational expressions is similar to adding and subtracting fractions. 1) u + 5v 8v2u2 − u − 6v 8v2u2 11 8vu2 2) 5n 30 m + 2m + 4n 30 m 9n + 2m 30 m 3) a + 2b 6a3 −.
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