2124×142=
\( 2\frac{4}{12}\times1\frac{2}{4}= \)
\( 3\frac{4}{6}\times2\frac{2}{4}= \)
\( 3\frac{5}{15}\times2\frac{2}{10}= \)
\( 1\frac{4}{6}\times1\frac{2}{8}= \)
\( 1\frac{6}{8}\times2\frac{2}{6}= \)
\( 2\frac{2}{6}\times1\frac{4}{10}= \)
\( 4\frac{10}{12}\times2\frac{2}{10}= \)
\( 1\frac{2}{8}\times1\frac{7}{14}= \)
\( 1\frac{3}{9}\times2\frac{2}{4}= \)
\( 1\frac{4}{12}\times1\frac{4}{14}= \)
\( 2\frac{10}{20}\times1\frac{4}{16}= \)\( \)
\( 3\frac{6}{9}\times3\frac{4}{20}= \)