| $$ \begin{aligned}5 \cdot \frac{\sqrt{29}}{29}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{5\sqrt{29}}{29}\end{aligned} $$ | |
| ① | $$ \color{blue}{ 5 } \cdot \sqrt{29} = 5 \sqrt{29} $$$$ \color{blue}{ 1 } \cdot 29 = 29 $$ |