1. 直接写出得数。
$36 ÷ \frac{18}{7} =$
$2 × 3.14 × 10 =$
$188.4 ÷ 6 ÷ 3.14 =$
$0.375 ÷ \frac{3}{8} =$
$94.2 ÷ 3 ÷ 10 =$
$3.14 × 27 × \frac{1}{9} =$
$\frac{16}{9} ÷ \frac{4}{9} =$
$7.85 × 2 ÷ 3.14 =$
$1.256 × 20 ÷ 3.14 =$
$\frac{3}{4} × 1\frac{1}{5} =$
$\frac{1}{3} × 3.14 × 24 =$
$0.2826 ÷ 3.14 =$
$\frac{5}{14} × 1.4 =$
$0.628 ÷ 3.14 × 10 =$
$3.14 × \frac{1}{8} × 16 =$

1. 14 62.8 10 1 3.14 9.42 4 5 8 $\frac{9}{10}$ 25.12 0.09 0.5 2 6.28

2. 填表。

2. 5 31.4 78.5
16 50.24 200.96
2 4 12.56
6 12 37.68

3. 计算下面各题，能简算的要简算。
$\frac{18}{25} ÷ \frac{3}{5} × \frac{2}{3}$
$(1 - \frac{3}{10} ÷ \frac{6}{7}) × \frac{5}{13}$
$(15 - 14 × \frac{4}{7}) ÷ \frac{8}{21}$
$\frac{7}{8} × 0.375 + \frac{3}{8} ÷ \frac{8}{9}$
$30 × (\frac{2}{5} + \frac{1}{6} - \frac{4}{15})$
$100.48 ÷ 16 × \frac{5}{6} ÷ 3.14$
$\frac{7}{9} × \frac{1}{5} + \frac{2}{9} × \frac{1}{5}$
$\frac{8}{15} × 16 - \frac{8}{15}$
$12 ÷ [ (\frac{1}{8} + \frac{5}{6}) × \frac{12}{23} ]$

3. $\frac{4}{5}$ $\frac{1}{4}$ $\frac{147}{8}$ $\frac{3}{4}$ 9 $\frac{5}{3}$ $\frac{1}{5}$ 8 24