Question
Answer
$$\sqrt{10}\cdot\sqrt{40}=20$$
Explanation
| $$ \begin{aligned}\sqrt{10}\cdot\sqrt{40}& \xlongequal{ }\sqrt{400} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}20\end{aligned} $$ | |
| ① | The square root of $ 400 $ is $ 20 $. |
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