\[\boxed{\mathbf{Вариант\ 1.}}\]
\[\boxed{\mathbf{1.}}\]
\[Ответ:\ \ \ 570.\]
\[\boxed{\mathbf{2.}}\]
\[Ответ:\ \ 609.\]
\[\boxed{\mathbf{3.}}\]
\[400 + 80 + 2 = 482\]
\[Ответ:\ \ \ 482.\]
\[\boxed{\mathbf{4.}}\]
\[Ответ:\ \ \ 137 < 173.\]
\[\boxed{\mathbf{5.}}\]
\[5\ сот = 500\]
\[500 - 1 = 499\]
\[Ответ:\ \ \ 499.\]
\[\boxed{\mathbf{6.}}\]
\[370 - 300 = 70\]
\[Ответ:\ \ \ 70.\]
\[\boxed{\mathbf{7.}}\]
\[x + 46 = 846\]
\[x = 846 - 46\]
\[x = 800.\]
\[Ответ:\ \ \ x = 800.\]
\[\boxed{\mathbf{8.}}\]
\[600 + 50 + 8 < 600 + 60 + 7\]
\[Ответ:\ \ \ 60.\]