Question

[Lê Ngọc Anh]

Tính giá trị các biểu thức sau:

a) \(\dfrac{2}{3}\)+\(\dfrac{1}{3}\).(\(\dfrac{-4}{9}\)+\(\dfrac{5}{6}\)):\(\dfrac{7}{12}\)

Answer 1

[Đào Tùng Dương]

\(=\dfrac{2}{3}+\dfrac{1}{3}.\left(\dfrac{7}{18}\right):\dfrac{7}{12}\)

\(=\dfrac{2}{3}+\dfrac{7}{54}:\dfrac{7}{12}\)

\(=\dfrac{2}{3}+\dfrac{2}{9}\)

\(=\dfrac{8}{9}\)