Question

thực hiện phép tính (tính nhanh nếu có thể)

Answer 1

e) \(4\dfrac{25}{16}+25.\left(\dfrac{9}{16}:\dfrac{125}{64}:\dfrac{-27}{8}\right)\)

\(=\dfrac{89}{16}+25.\left(\dfrac{9}{16}:\dfrac{125}{64}:\dfrac{-27}{8}\right)\)

\(=\dfrac{89}{16}+25.\left(\dfrac{36}{125}:\dfrac{-27}{8}\right)\)

\(=\dfrac{89}{16}+25.\dfrac{-32}{375}\)

\(=\dfrac{89}{16}+\dfrac{-32}{15}\)

\(=\dfrac{823}{240}\)

g) \(\dfrac{2}{3}-4.\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\)

\(=\dfrac{2}{3}-4.\dfrac{5}{4}\)

\(=\dfrac{2}{3}-5\)

\(=\dfrac{-13}{3}\)