Answer
$$5\sqrt{64}=40$$
Explanation
| $$ \begin{aligned}5\sqrt{64}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5\cdot8 \xlongequal{ } \\[1 em] & \xlongequal{ }40\end{aligned} $$ | |
| ① | The square root of $ 64 $ is $ 8 $. |
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