Question

Tính bằng 2 cách:

(2/3x4/5)x5/6.

Answer 1

Cách 1:

\(\left(\frac{2}{3}\times\frac{4}{5}\right)\times\frac{5}{6}\)

\(=\frac{8}{15}\times\frac{5}{6}\)

\(=\frac{4}{9}\)

Cách 2:

\(\left(\frac{2}{3}\times\frac{4}{5}\right)\times\frac{5}{6}\)

\(=\frac{2}{3}\times\left(\frac{4}{5}\times\frac{5}{6}\right)\)

\(=\frac{2}{3}\times\frac{2}{3}\)

\(=\frac{4}{9}\)