問題
$\bigg\{\bigg(3\dfrac{1}{3}-1.25\bigg)\times0.8\div0.125-10\bigg\}\times\dfrac{3}{10}=\fbox{ }$
解説
$\bigg\{\bigg(\dfrac{10}{3}-\dfrac{5}{4}\bigg)\times\dfrac{4}{5}\times8-10\bigg\}\times\dfrac{3}{10}$
$=\bigg(\dfrac{25}{12}\times\dfrac{4}{5}\times8-10\bigg)\times\dfrac{3}{10}$
$=\dfrac{10}{3}\times\dfrac{3}{10}$$=$$1$
