\[\boxed{\mathbf{Страница}\mathbf{\ \ 46}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{1}\mathbf{.}}\]
\(7 \cdot 8 = 56\)
\(6 + 6 = 12\)
\(2 \cdot 9 = 18\)
\(63\ :7 = 9\)
\(9 \cdot 7 = 63\)
\(5 \cdot 7 = 35\)
\(63\ :7 = 9\)
\(40 - 8 = 32\)
\(40\ :8 = 5\)
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{\ }}\]
\[20\ км\ пробежала\ каждая\ \]
\[лошадь.\]
\[Ответ:20\ км.\]
\[\boxed{\mathbf{3}\mathbf{.}\mathbf{\ }}\]
\[7 \cdot x = 56\]
\[x = 8.\]
\[x \cdot 8 = 48\]
\[x = 6.\]
\[32\ :x = 4\]
\[x = 8.\]
\[\boxed{\mathbf{4}\mathbf{.}\mathbf{\ }}\]