1. Calculate: $84 \frac{4}{19} \times 1.375 + 105 \frac{5}{19} \times 0.8=$
【Answer】200
$$
\begin{aligned}
\text { [Analysis] Original expression } & =\left(80+\frac{80}{19}\right) \times \frac{11}{8}+\left(105+\frac{5}{19}\right) \times \frac{4}{5} \\
& =110+\frac{110}{19}+84+\frac{4}{19} \\
& =200
\end{aligned}
$$