1. The value of the expression $10-10.5 \div[5.2 \times 14.6-(9.2 \times 5.2+5.4 \times 3.7-4.6 \times 1.5)]$ multiplied by 20 is
【Answer】186
$$
\begin{aligned}
\text { [Analysis] Original expression } & =10-10.5 \div[5.2 \times(14.6-9.2)-5.4 \times 3.7+4.6 \times 1.5] \\
& =10-10.5 \div(5.4 \times 1.5+4.6 \times 1.5) \\
& =10-10.5 \div 15 \\
& =9.3 \\
& \Rightarrow 9.3 \times 20=186
\end{aligned}
$$