\[\boxed{\mathbf{Вариант\ 2.}}\]
\[\boxed{\mathbf{1.}}\]
\[28 = 4 \cdot 7\]
\[Ответ:4 \cdot 7.\]
\[\boxed{\mathbf{2.}}\]
\[21\ :7 = 3\]
\[Ответ:21.\]
\[\boxed{\mathbf{3.}}\]
\[24\ :6 = 4\ (раза).\]
\[Ответ:в\ 4\ раза.\]
\[\boxed{\mathbf{4.}}\]
\[9 \cdot 4 = 36\]
\[Ответ:36.\]
\[\boxed{\mathbf{5.}}\]
\[x \cdot 3 = 24\]
\[x = 24\ :3\]
\[x = 8.\]
\[Ответ:x = 8.\]
\[\boxed{\mathbf{6.}}\]
\[Ответ:47 - (18 + 15)\ :3.\]
\[\boxed{\mathbf{7.}}\]
\[32\ :4 < 27\ :3\]
\[8 < 9\]
\[Ответ:« < ».\]
\[\boxed{\mathbf{8.}}\]
\[8 \cdot 2\ :4 = 4\]
\[Ответ:« \cdot »\ \ и\ \ «\ :».\]