| $$ \begin{aligned}10\cdot6\sqrt{96}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}240\sqrt{6}\end{aligned} $$ | |
| ① | $$ 60 \sqrt{96} =
60 \sqrt{ 4 ^2 \cdot 6 } =
60 \sqrt{ 4 ^2 } \, \sqrt{ 6 } =
60 \cdot 4 \sqrt{ 6 } =
240 \sqrt{ 6 } $$ |