Ответ:

\(900:100=9\).

\(23\cdot10=230\).

\(1\cdot58=58\).

\(81:81+64\cdot0=1+0=1\).

\(81:9:9\cdot1-1=9:9\cdot1-1=1-1=0\).

\(28:(5-21:21)=28:(5-1)=28:4=7\).

\(300:10=30\).

\(510:3=170\).

\(400:4=100\).

Ответ: 9; 230; 58; 1; 0; 7; 30; 170; 100.