\[\boxed{\mathbf{3.}}\]
\[Числа,\ которые\ получаются\ от\]
\[\ умножения\ на\ 5:\]
\[1,\ ,\ 2,\ 4,\ 1,\ 5,\ 3,\ 3.\]
\[\boxed{\mathbf{4.}}\]
\[5 \cdot 6 = 30\]
\[30 - 14 = 16\]
\[16\ :4 = 4\]
\[4 \cdot 9 = 36\]
\[36 - 8 = 28\]
\[28\ :4 = 7\]
\[7 \cdot 3 = 21\]
\[21 + 29 = 50\]
\[\boxed{\mathbf{5.}}\]
\[3 \cdot 5 + 4 < 3 \cdot 5 + 5\]
\[2 \cdot 6 - 7 > 2 \cdot 6 - 4\]
\[2 \cdot 8 = 4 \cdot 4\]
\[4 \cdot 7 + 2 > 4 \cdot 7 + 1\]
\[3 \cdot 3 < 3 \cdot 5\]
\[3 \cdot 7 = 3 + 3 + 3 + 3 + 3 + 3 + 3\]
\[\boxed{\mathbf{6.}}\]
\[7 \cdot 5 = 35\ (хвоинок) - растет\ \ \]
\[на\ веточке.\]
\[Ответ:35\ хвоинок.\]
\[\boxed{\mathbf{7.}}\]
\[5 \cdot 8 = 40\]
\[5 \cdot 5 = 25\]
\[5 \cdot 9 = 45\]
\[5 \cdot 3 = 15\]
\[5 \cdot 4 = 20\]
\[5 \cdot 2 = 10\]
\[5 \cdot 4 = 20\]
\[5 \cdot 4 = 20\]
\[5 \cdot 7 = 35\]