1.算一算。
$32×2=$
$42×2=$
$132×2=$
$432×2=$
$2×21=$
$14×2=$
$112×3=$
$111×9=$
$2×12=$
$32×3=$
$111×2=$
$312×3=$
$33×2=$
$2×13=$
$123×3=$
$411×2=$
$12×3=$
$34×2=$
$211×2=$
$111×3=$
$21×4=$
$22×2=$
$413×2=$
$422×2=$
$2×31=$
$21×3=$
$233×2=$
$111×5=$
$3×23=$
$22×4=$
$124×2=$
$311×2=$

$32×2=64$
$42×2=84$
$132×2=264$
$432×2=864$
$2×21=42$
$14×2=28$
$112×3=336$
$111×9=999$
$2×12=24$
$32×3=96$
$111×2=222$
$312×3=936$
$33×2=66$
$2×13=26$
$123×3=369$
$411×2=822$
$12×3=36$
$34×2=68$
$211×2=422$
$111×3=333$
$21×4=84$
$22×2=44$
$413×2=826$
$422×2=844$
$2×31=62$
$21×3=63$
$233×2=466$
$111×5=555$
$3×23=69$
$22×4=88$
$124×2=248$
$311×2=622$

2.列竖式计算。
•23×2=
•13×3=
•41×2=
•32×3=

•12×4=
•113×3=
•211×4=
•141×2=

•44×2=
•113×2=
•122×4=
•231×3=

•$23×2=46$
$\begin{array}{r} 23\\ ×2\\ \hline 46\end{array}$
•$13×3=39$
$\begin{array}{r} 13\\ ×3\\ \hline 39\end{array}$
•$41×2=82$
$\begin{array}{r} 41\\ ×2\\ \hline 82\end{array}$
•$32×3=96$
$\begin{array}{r} 32\\ ×3\\ \hline 96\end{array}$
•$12×4=48$
$\begin{array}{r} 12\\ ×4\\ \hline 48\end{array}$
•$113×3=339$
$\begin{array}{r} 113\\ ×3\\ \hline 339\end{array}$
•$211×4=844$
$\begin{array}{r} 211\\ ×4\\ \hline 844\end{array}$
•$141×2=282$
$\begin{array}{r} 141\\ ×2\\ \hline 282\end{array}$
•$44×2=88$
$\begin{array}{r} 44\\ ×2\\ \hline 88\end{array}$
•$113×2=226$
$\begin{array}{r} 113\\ ×2\\ \hline 226\end{array}$
•$122×4=488$
$\begin{array}{r} 122\\ ×4\\ \hline 488\end{array}$
•$231×3=693$
$\begin{array}{r} 231\\ ×3\\ \hline 693\end{array}$