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1. 先想一想$\square$里最大能填几，再完成竖式计算。
$\square\times5＜26$ $\square\times7＜40$ $9\times\square＜75$
$\begin{array}{r} \square\\ 5\enclose{longdiv} {26}\end{array}$ $\begin{array}{r} \square\\ 7\enclose{longdiv} {40}\end{array}$ $\begin{array}{r} \square\\ 9\enclose{longdiv} {75}\end{array}$
$\square\times5＜26$ $\square\times7＜40$ $9\times\square＜75$
$\begin{array}{r} \square\\ 5\enclose{longdiv} {26}\end{array}$ $\begin{array}{r} \square\\ 7\enclose{longdiv} {40}\end{array}$ $\begin{array}{r} \square\\ 9\enclose{longdiv} {75}\end{array}$
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2. 填表。
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3. 下面的计算对吗？对的在括号里画“√”，错的在括号里画“×”，并改正。
$\begin{array}{r} 6\\ 6\enclose{longdiv} {38}\\ 36\\ \hline 2\end{array}$ ( )
$\begin{array}{r} 8\\ 9\enclose{longdiv} {81}\\ 72\\ \hline 9\end{array}$ ( )
$\begin{array}{r} 6\\ 6\enclose{longdiv} {38}\\ 36\\ \hline 2\end{array}$ ( )
$\begin{array}{r} 8\\ 9\enclose{longdiv} {81}\\ 72\\ \hline 9\end{array}$ ( )
答案
