\[\boxed{\mathbf{Страница}\mathbf{\ \ 66}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{66}\mathbf{.}}\]
\[72\ :8 + 3 + 7 = 9 + 12 = 19\]
\[72\ :8\ :3 \cdot 7 = 3 \cdot 7 = 21\]
\[72 + 8 + 3 - 7 = 83 - 7 = 76\]
\[72 - 8 - 3 - 7 = 64 - 10 = 54\]
\[7 \cdot (18 - 9) = 7 \cdot 9 = 63\]
\[(3 \cdot 5 + 3)\ :2 = 18\ :2 = 9\]
\[21\ :7 + 4 = 3 + 4 = 7\]
\[(45 + 3)\ :6 = 48\ :6 = 8\]
\[\boxed{\mathbf{67}\mathbf{.}\mathbf{\ }}\]
\[Запишите\ в\ рамки\ только\ \]
\[ответ.\]
\[Решение\ в\ помощь.\]
\(3 \cdot 6 = 18\)
\(7 \cdot 5 = 35\)
\(6 \cdot 7 = 42\)
\(8 + 6 = 14\)
\(72 - 9 = 63\)
\(56\ :7 = 8\)
\(4 \cdot 4 = 16\)
\(6 \cdot 5 = 30\)
\(72\ :8 = 9\)
\[\boxed{\mathbf{68}\mathbf{.}\mathbf{\ }}\]
\[1)\ 8 \cdot 4 = 32\ (ореха) - в\ дупле\ у\ \]
\[белки.\]
\[2)\ 32 - 14 = 18\ (шишек) - в\ \]
\[дупле\ у\ белки.\]
\[3)\ 8 + 32 + 14 = 40 + 14 =\]
\[= 54\ (штуки) - грибов,\ орехов\ \]
\[и\ шишек\ в\ дупле\ у\ белки.\]
\[Ответ:54\ штуки.\]