\[\boxed{\mathbf{Страница}\mathbf{\ \ 67}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{69}\mathbf{.}}\]
\[1)\ 4\ :2 = 2\ (м) - третья\ часть\ \]
\[березы,\ или\ высота\ липы.\]
\[2)\ 2 \cdot 3 = 6\ (м) - высота\ \]
\[березы.\]
\[Ответ:6\ м.\]
\[\boxed{\mathbf{70}\mathbf{.}\mathbf{\ }}\]
\[56\ :7 = 8\]
\[6 \cdot 3 = 18\]
\[12\ :3 = 4\]
\[4 \cdot 9 = 36\]
\[27\ :3 = 9\]
\[8 \cdot 5 = 40\]
\[14\ :7 = 2\]
\[4 \cdot 8 = 32\]
\[\boxed{\mathbf{71}\mathbf{.}\mathbf{\ }}\]
\[8 \cdot 7 = 56\]
\[6 \cdot 3 = 18\]
\[5 \cdot 4 = 20\]
\[7 \cdot 5 = 35\]
\[6 \cdot 7 = 42\]
\[45\ :5 = 9\]
\[9 \cdot 9 = 81\]
\[64\ :8 = 8\]
\[7 \cdot 0 = 0\]
\[6 \cdot 4 = 24\]
\[5 \cdot 3 = 15\]
\[4 \cdot 4 = 16\]
\[\boxed{\mathbf{72}\mathbf{.}}\]
\[28\ :4 + 1 = 8\ (столбов) -\]
\[пошло\ на\ забор.\]
\[Ответ:8\ столбов.\]
\[\boxed{\mathbf{73}\mathbf{.}\mathbf{\ }}\]
\[1 \cdot 23 > 23 \cdot 0\]
\[8 \cdot 0 = 8 \cdot 1 \cdot 0\]
\[(46 - 6) \cdot 0 = (46 + 6) \cdot 0\]
\[42 \cdot 0 = 51 \cdot 0\]
\[45 \cdot 1 < 46 \cdot 1\]
\[77 \cdot 1 > 78 \cdot 1 \cdot 0\]