Question

Tính.

\(\dfrac{5}{8}\times\dfrac{8}{15}\)                   \(\dfrac{12}{7}:\dfrac{8}{7}\)                   \(6\times\dfrac{7}{9}\)                       \(\dfrac{24}{5}:4\)

Answer 1

\(\dfrac{5}{8}\times\dfrac{8}{15}=\dfrac{5}{15}\times\dfrac{8}{8}=\dfrac{5}{15}=\dfrac{1}{3}\)

\(\dfrac{12}{7}:\dfrac{8}{7}=\dfrac{12}{7}\times\dfrac{7}{8}=\dfrac{12}{8}=\dfrac{3}{2}\)

\(6\times\dfrac{7}{9}=\dfrac{6\times7}{9}=\dfrac{42}{9}=\dfrac{14}{3}\)

\(\dfrac{24}{5}:4=\dfrac{24}{5\times4}=\dfrac{24}{20}=\dfrac{6}{5}\)