\[\boxed{\mathbf{9}\mathbf{.}}\]
\[\mathbf{Умножение\ на\ 3}\] | \[\mathbf{Деление\ на\ 3}\] |
---|---|
\[3 \cdot 1 = 3\] | \[3\ :3 = 1\] |
\[3 \cdot 2 = 6\] | \[6\ :3 = 2\] |
\[3 \cdot 3 = 9\] | \[9\ :3 = 3\] |
\[3 \cdot 4 = 12\] | \[12\ :3 = 4\] |
\[3 \cdot 5 = 15\] | \[15\ :3 = 5\] |
\[3 \cdot 6 = 18\] | \[18\ :3 = 6\] |
\[3 \cdot 7 = 21\] | \[21\ :3 = 7\] |
\[3 \cdot 8 = 24\] | \[24\ :3 = 8\] |
\[3 \cdot 9 = 27\] | \[27\ :3 = 9\] |
\[3 \cdot 10 = 30\] | \[30\ :3 = 10\] |