1. (10 points) Calculate: $84 \frac{4}{19} \times 1.375 + 105 \frac{5}{19} \times 0.8=$
【Analysis】First, convert the mixed numbers to improper fractions and decimals to fractions, then simplify and solve.
【Solution】Solve: $84 \frac{4}{19} \times 1.375+105 \frac{5}{19} \times 0.8$
$$
\begin{array}{l}
=\frac{1600}{19} \times \frac{11}{8}+\frac{2000}{19} \times \frac{4}{5} \\
=\frac{2200}{19}+\frac{1600}{19} \\
=\frac{3800}{19} \\
=200
\end{array}
$$

Therefore, the answer is: 200.