\[\boxed{\text{441\ (441).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[A = \{ 1,\ 9,\ 5,\ 8\}\]
\[1)\ x = 98,\ \ x \subset A;\]
\[3)\ x = 519,\ \ x \subset A;\]
\[4)\ x = 5858,\ \ x \subset A;\]
\[5)\ x = 195\ 888,\ \ x \subset A.\]