3. Danielle said she read $\frac{1}{2}$ of a book. Select all the fractions that are equivalent to $\frac{1}{2}$. $\frac{3}{6}$ $\frac{5}{10}$ $\frac{6}{12}$ $\frac{3}{5}$ $\frac{6}{8}$

Step 1 ：Danielle said she read \(\frac{1}{2}\) of a book. We are asked to select all the fractions that are equivalent to \(\frac{1}{2}\).

Step 2 ：Two fractions are equivalent if they have the same value when simplified. So, we need to simplify each of the given fractions and check if they are equal to \(\frac{1}{2}\).

Step 3 ：The given fractions are \(\frac{3}{6}\), \(\frac{5}{10}\), \(\frac{6}{12}\), \(\frac{3}{5}\), and \(\frac{6}{8}\).

Step 4 ：After simplifying, we find that the fractions equivalent to \(\frac{1}{2}\) are \(\frac{3}{6}\), \(\frac{5}{10}\), and \(\frac{6}{12}\).

Step 5 ：Final Answer: The fractions equivalent to \(\frac{1}{2}\) are \(\boxed{\frac{3}{6}}\), \(\boxed{\frac{5}{10}}\), and \(\boxed{\frac{6}{12}}\).