問題
$1.2\times\dfrac{5}{6}-\bigg(\dfrac{4}{5}-\dfrac{1}{4}\bigg)\div0.8=◻︎$
解説
$1.2\times\dfrac{5}{6}-\bigg(\dfrac{4}{5}-\dfrac{1}{4}\bigg)\div0.8$
$\\$
$=\dfrac{12}{10}\times\dfrac{5}{6}-\dfrac{16-5}{20}\times\dfrac{5}{4}$
$\\$
$=1-\dfrac{1}{16}$
$\\$
$=\dfrac{5}{16}$より, $◻︎=\dfrac{5}{16}$となります.
