1. Which of the following numbers is the closest to the value of $\frac{17 \times 0.3 \times 20.16}{999}$ ?
A 0.01
B 0.1
C 1
D 10
E 100
1. B The calculation can be approximated as follows:
$$
\frac{17 \times 0.3 \times 20.16}{999} \approx \frac{17 \times 3 \times 2}{1000}=\frac{51 \times 2}{1000} \approx \frac{100}{1000}=0.1
$$