Mathematics, 16.04.2021 14:10, laniflower737

Lena starts to use the standard algorithm to solve 39\times439×439, times, 4. Her work is shown below. \begin{aligned} \overset{\blueD{m}}3\overset{}9& ;\\ \underline{{} \times \phantom{~} 4}&\\ 6& \end{aligned}

$Lena starts to use the standard algorithm to solve 39\times439×439, times, 4. Her work is shown bel$

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Lena starts to use the standard algorithm to solve 39\times439×439, times, 4. Her work is shown belo...