Cách 1:
\(\left(\frac{1}{3}-\frac{1}{5}\right).\frac{1}{2}\)
\(=\left(\frac{5}{15}-\frac{3}{15}\right).\frac{1}{2}\)
\(=\frac{2}{15}.\frac{1}{2}\)
\(=\frac{1}{15}\)
Cách 2:
\(\left(\frac{1}{3}-\frac{1}{5}\right).\frac{1}{2}\)
\(=\frac{1}{3}.\frac{1}{2}-\frac{1}{5}.\frac{1}{2}\)
\(=\frac{1}{6}-\frac{1}{10}\)
\(=\frac{10}{60}-\frac{6}{60}\)
\(=\frac{1}{15}\)