\[\boxed{\mathbf{Вариант\ 1.}}\]
\[\boxed{\mathbf{1.}}\]
\[630 + 70 = 700\]
\[Ответ:\ \ 700.\]
\[\boxed{\mathbf{2.}}\]
\[890 - 340 = 550\]
\[Ответ:\ \ 550.\]
\[\boxed{\mathbf{3.}}\]
\[470 - 200 = 270\]
\[Ответ:\ \ на\ 270.\]
\[\boxed{\mathbf{4.}}\]
\[150 + 40 = 190\]
\[Ответ:\ \ 190.\]
\[\boxed{\mathbf{5.}}\]
\[700 - 20 = 680\]
\[Ответ:\ \ 680.\]
\[\boxed{\mathbf{6.}}\]
\[260 - 50 = 210\]
\[Ответ:\ \ на\ 210.\]
\[\boxed{\mathbf{7.}}\]
\[400 + 230 = 630\]
\[Ответ:\ \ 630.\]
\[\boxed{\mathbf{8.}}\]
\[110 + 700 = 810\]
\[Ответ:\ \ 810.\]
\[\boxed{\mathbf{9.}}\]
\[230 - 20 < 250\]
\[Ответ:« - ».\]
\[\boxed{\mathbf{10.}}\]
\[370 + 200 = 570\]
\[530 + 40 = 570\]