Question

Tính bằng cách thuận tiện.

\(\dfrac{10}{11}\times\dfrac{9}{16}\times\dfrac{11}{10}\times\dfrac{8}{9}\)

Answer 1

\(\dfrac{10}{11}\times\dfrac{9}{16}\times\dfrac{11}{10}\times\dfrac{8}{9}\)

\(=\dfrac{10}{11}\times\dfrac{11}{10}\times\dfrac{9}{9}\times\dfrac{8}{16}\)

\(=1\times1\times\dfrac{1}{2}=\dfrac{1}{2}\)