Question

[Lê Yến Nhi]

Tính nhanh 7/9x3/5+3/5x5/6+3/5x1

Answer 1

[Hoàng Kim Oanh]

\(\frac{7}{9}\times\frac{3}{5}+\frac{3}{5}\times\frac{5}{6}+\frac{3}{5}\times1\)

\(=\frac{3}{5}\times\left(\frac{7}{9}+\frac{5}{6}+1\right)\)

\(=\frac{3}{5}\times\frac{47}{18}\)

\(=\frac{47}{30}\)

 #hoktot<3#