This document discusses adding and subtracting fractions. It provides examples of adding 2/5 + 1/3 by reducing the fractions to a common denominator of 15 to get an answer of 3/8. It also shows how to subtract fractions like 3/4 - 1/3 by finding a common denominator of 12, converting the fractions to equivalent fractions with that denominator, and then subtracting the numerators to get the answer.