Question

Answer 1

\(\dfrac{15}{4}:\dfrac{2}{5}-\dfrac{3}{8}\)

\(=\dfrac{15}{4}.\dfrac{5}{2}-\dfrac{3}{8}\)

\(=\dfrac{75}{8}-\dfrac{3}{8}\)

\(=\dfrac{75-3}{8}\)

\(=9\)

Answer 2

\(=9\)

Answer 3

\(\dfrac{15}{4}:\dfrac{2}{5}-\dfrac{3}{8}=\)

\(=\dfrac{15}{4}\times\dfrac{5}{2}-\dfrac{3}{8}\)

\(=\dfrac{75}{8}-\dfrac{3}{8}\)  

\(=9\)

 

Answer 4

 \(\dfrac{69}{16}\) /ko bt có đúng ko/