§ Задание 207
\[\boxed{\text{4.\ 207}}\]
\[\textbf{а)} - 5,4876 + ( - 21,5072) =\]
\[= - 26,9948\]
\[\textbf{б)}\ 14,2896 + ( - 8,546) =\]
\[= 5,7436\]
\[\textbf{в)} - 4,5678 + ( - 0,3498) + 9,71 =\]
\[= 4,7924\]

\[= - 0,01253\ \]
\[\boxed{\text{4.\ 207}}\]
\[\textbf{а)} - 5,4876 + ( - 21,5072) =\]
\[= - 26,9948\]
\[\textbf{б)}\ 14,2896 + ( - 8,546) =\]
\[= 5,7436\]
\[\textbf{в)} - 4,5678 + ( - 0,3498) + 9,71 =\]
\[= 4,7924\]

\[= - 0,01253\ \]