$\frac{5}{18}$ - 1,456 : $\frac{7}{25}$ + 4,5 x $\frac{4}{5}$ Giúp với!!!!!
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$\dfrac{5}{18}$`-1,456:`$\dfrac{7}{25}$`+4,5×`$\dfrac{4}{5}$
`=`$\dfrac{5}{18}$`-1,456×`$\dfrac{25}{7}$`+`$\dfrac{4,5×4}{5}$
`=`$\dfrac{5}{18}$`-`$\dfrac{1,456×25}{7}$`+`$\dfrac{18}{5}$
`=`$\dfrac{5}{18}$`-`$\dfrac{36,4}{7}$`+`$\dfrac{18}{5}$
`=`$\dfrac{5}{18}$`-`$\dfrac{26}{5}$`+`$\dfrac{18}{5}$
`=`$\dfrac{25}{90}$`-`$\dfrac{468}{90}$`+`$\dfrac{324}{90}$
`=`$\dfrac{25-468+324}{90}$
`=`$\dfrac{-119}{90}$
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