3/4+2/5.4:8/3
=3/4+8/5:8/3
=3/4+3/5
=27/20
\(\dfrac{3}{4}+\dfrac{2}{5}\times4:\dfrac{8}{3}\)
\(=\dfrac{3}{4}+\dfrac{8}{5}\times\dfrac{3}{8}\)
\(=\dfrac{3}{4}+\dfrac{3}{5}\)
\(=\dfrac{27}{20}\)
\(\dfrac{3}{4}+\dfrac{2}{5}\times\dfrac{4}{1}:\dfrac{8}{3}=\dfrac{3}{4}+\dfrac{8}{5}\times\dfrac{3}{8}=\dfrac{3}{4}+\dfrac{24}{40}=\dfrac{30+24}{40}=\dfrac{54}{40}\)
`3/4+2/5×4:8/3=3/4+8/5:8/3=3/4+8/5×3/8=3/4+3/5=15/20+12/20=27/20`
3/4+2/5.4:8/3
=3/4+8/5:8/3
=3/4+3/5
=27/20