① 算一算。
$\begin{array}{r} 14\\ ×22\\ \hline \end{array}$
$\begin{array}{r} 43\\ ×21\\ \hline \end{array}$
$\begin{array}{r} 33\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 24\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 55\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 12\\ ×31\\ \hline \end{array}$
$\begin{array}{r} 23\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 28\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 34\\ ×22\\ \hline \end{array}$
$\begin{array}{r} 32\\ ×31\\ \hline \end{array}$
$\begin{array}{r} 43\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 31\\ ×23\\ \hline \end{array}$
$\begin{array}{r} 14\\ ×22\\ \hline \end{array}$
$\begin{array}{r} 43\\ ×21\\ \hline \end{array}$
$\begin{array}{r} 33\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 24\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 55\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 12\\ ×31\\ \hline \end{array}$
$\begin{array}{r} 23\\ ×12\\ \hline \end{array}$
$\begin{array}{r} 28\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 34\\ ×22\\ \hline \end{array}$
$\begin{array}{r} 32\\ ×31\\ \hline \end{array}$
$\begin{array}{r} 43\\ ×11\\ \hline \end{array}$
$\begin{array}{r} 31\\ ×23\\ \hline \end{array}$
答案:
308
903
396
288
605
372
276
308
748
992
473
713
903
396
288
605
372
276
308
748
992
473
713
② 下面的计算正确吗?正确的在括号里画“√”,错误的在括号里写出正确答案。
44×22=8888( )
21×23=443( )
11×35=385( )
23×33=759( )
21×13=273( )
33×22=626( )
44×22=8888( )
21×23=443( )
11×35=385( )
23×33=759( )
21×13=273( )
33×22=626( )
答案:
968
483
√
√
√
726
483
√
√
√
726
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