2. (3 points) Calculate: $99 \times \frac{5}{8}-0.625 \times 68+6.25 \times 0.1=$ $\qquad$
2. (3 points) Calculate: $99 \times \frac{5}{8}-0.625 \times 68+6.25 \times 0.1=20$.
【Solution】Solution: $99 \times \frac{5}{8}-0.625 \times 68+6.25 \times 0.1$,
$$
\begin{array}{l}
=99 \times 0.625-0.625 \times 68+0.625 \times 1, \\
=(99-68+1) \times 0.625, \\
=32 \times 0.625, \\
=4 \times 8 \times 0.625, \\
=4 \times 5, \\
=20 ;
\end{array}
$$

Therefore, the answer is: 20.