§ Задание 55
\[\boxed{\mathbf{55}\mathbf{.}}\]

\[\textbf{б)}\ 19 + 51 - 1 = 19 + 50 = 69\]
\[34 + (69 - 3) = 34 + 66 = 100\]
\[92 + (16 - 8) = 92 + 8 = 100\]
\[14 - 7 + 53 = 7 + 53 = 60\]
\[\boxed{\mathbf{55}\mathbf{.}}\]

\[\textbf{б)}\ 19 + 51 - 1 = 19 + 50 = 69\]
\[34 + (69 - 3) = 34 + 66 = 100\]
\[92 + (16 - 8) = 92 + 8 = 100\]
\[14 - 7 + 53 = 7 + 53 = 60\]