$$ \begin{aligned}\frac{6}{4}+\sqrt{5}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{ 6 : \color{orangered}{ 2 } }{ 4 : \color{orangered}{ 2 }} + \sqrt{5} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{3}{2}+\sqrt{5}\end{aligned} $$ | |
① | Divide both the top and bottom numbers by $ \color{orangered}{ 2 } $. |