1: \(A=\sqrt{\dfrac{16}{25}}\cdot\sqrt{\dfrac{25}{16}}+\sqrt{\dfrac{49}{81}}:\sqrt{\dfrac{4}{9}}-\left(-\dfrac{1}{2}\right)^3\)
\(=1+\dfrac{7}{9}:\dfrac{2}{3}+\dfrac{1}{8}\)
\(=\dfrac{9}{8}+\dfrac{7}{9}\cdot\dfrac{3}{2}\)
\(=\dfrac{9}{8}+\dfrac{7}{6}=\dfrac{54+56}{48}=\dfrac{110}{48}=\dfrac{55}{24}\)
Đúng 0
Bình luận (0)
