Đáp án:

$35\dfrac{1}{6} : \left(-\dfrac{4}{5}\right) - 46\dfrac{1}{6} : \left(-\dfrac{4}{5}\right)=\dfrac{55}{4}$

Giải thích:

$35\dfrac{1}{6} : \left(-\dfrac{4}{5}\right) - 46\dfrac{1}{6} : \left(-\dfrac{4}{5}\right)$

$= \left(35\dfrac{1}{6} - 46\dfrac{1}{6}\right) : \left(-\dfrac{4}{5}\right)$

$= \left[\left(35 + \dfrac{1}{6}\right) - \left(46 + \dfrac{1}{6}\right)\right] : \left(-\dfrac{4}{5}\right)$

$= (35 - 46) : \left(-\dfrac{4}{5}\right)$

$= (-11) : \left(-\dfrac{4}{5}\right)$

$= (-11) \cdot \left(-\dfrac{5}{4}\right)$

$= \dfrac{55}{4}$