Question

\(2\dfrac{1}{2}\) +\(\dfrac{4}{7}:\dfrac{-8}{9}\)

6-3 x \(\dfrac{1^3}{3^3}\)

Answer 1

\(2\dfrac{1}{2}+\dfrac{4}{7}:\dfrac{-8}{9}\)

\(=\dfrac{5}{2}+\dfrac{4}{7}:\dfrac{-8}{9}\)

\(=\dfrac{5}{2}+\dfrac{-9}{14}\)

\(=\dfrac{13}{7}\)

\(6-3.\dfrac{1^3}{3^3}\)

\(=6-3.\dfrac{1}{27}\)

\(=6-\dfrac{1}{9}\)

\(=\dfrac{53}{9}\)

Chúc bạn học tốt!

Answer 2

\(2\dfrac{1}{2}+\dfrac{4}{7}:\dfrac{-8}{9}=\dfrac{5}{2}+\dfrac{4}{7}:\dfrac{-8}{9}\)

\(=\dfrac{5}{2}-\dfrac{9}{14}=\dfrac{13}{7}\)

\(6-3\cdot\dfrac{1^3}{3^3}=6-3\cdot\dfrac{1}{27}\)

\(=6-\dfrac{1}{9}=\dfrac{53}{9}\)

bài dễ này ấn máy tính là ra mà bạn :) Khó mới đăng chứ!