§ Задание 550
\[\boxed{\mathbf{2.550}}\]

\[= 0,731 - 0,0132 = 0,7178\]


\[= 6 - 1 = 5\]

\[81,3 - 78,5 = 2,8\]
\[4,2 + 2,85 = 7,05\]


\[2,95 + 3,1 = 6,05\]
\[47,7 - 41,1 = 6,6\]

\[399,3\ :39,93 = 39\ 930\ :3993 =\]
\[= 10\]
\[409,3 - 10 = 399,3\]
\[\boxed{\mathbf{2.550}}\]

\[= 0,731 - 0,0132 = 0,7178\]


\[= 6 - 1 = 5\]

\[81,3 - 78,5 = 2,8\]
\[4,2 + 2,85 = 7,05\]


\[2,95 + 3,1 = 6,05\]
\[47,7 - 41,1 = 6,6\]

\[399,3\ :39,93 = 39\ 930\ :3993 =\]
\[= 10\]
\[409,3 - 10 = 399,3\]