\[\boxed{\mathbf{Вариант\ 2.}}\]
\[\boxed{\mathbf{1.}}\]
\[990 - 1 = 989\]
\[Ответ:989.\]
\[\boxed{\mathbf{2.}}\]
\[6\ сот.\ 5\ ед. = 605\]
\[Ответ:605.\]
\[\boxed{\mathbf{3.}}\]
\[600 + 180 = 780\]
\[Ответ:780.\]
\[\boxed{\mathbf{4.}}\]
\[630 + 70 = 700\]
\[Ответ:700.\]
\[\boxed{\mathbf{5.}}\]
\[796 - 726 = 70\]
\[Ответ:70.\]
\[\boxed{\mathbf{6.}}\]
\[490 = 4\ сот.\ 9\ дес.\]
\[\boxed{\mathbf{7.}}\]
\[183\]
\[1 - единица\ сотен.\]
\[\boxed{\mathbf{8.}}\]
\[\boxed{\mathbf{9.}}\]
\[560 + 120 = 680\]
\[680 - 550 = 130\]
\[Ответ:130.\]