\[\boxed{\mathbf{447.}}\]
\[1)\ 30\ :3 = 10\]
\[12\ :3 = 4\]
\[24\ :3 = 8\]
\[18\ :3 = 6\]
\[15\ :3 = 5\]
\[9\ :3 = 3\]
\[21\ :3 = 7\]
\[27\ :3 = 9\]
\[2)\ 6\ :3 = 2\]
\[3\ :3 = 1\]