1. 直接写出得数。(20☆)
$\frac{2}{3} - \frac{5}{18} =$
$\frac{7}{8} - \frac{3}{16} =$
$0.75 + \frac{5}{4} =$
$0.2 + \frac{4}{5} =$
$\frac{1}{8} × \frac{1}{2} =$
$\frac{3}{11} × \frac{11}{9} =$
$\frac{5}{12} × 0.4 =$
$0.16 × \frac{5}{4} =$
$\frac{8}{7} ÷ \frac{4}{21} =$
$\frac{1}{36} ÷ \frac{5}{6} =$
$\frac{7}{10} ÷ 0.2 =$
$0.12 ÷ \frac{6}{5} =$
$\frac{7}{12} ÷ \frac{1}{2} =$
$\frac{8}{3} ÷ \frac{16}{21} =$
$\frac{11}{15} ÷ 0.11 =$
$0.04 ÷ \frac{8}{13} =$
$\frac{7}{8} ÷ \frac{21}{16} =$
$\frac{7}{3} ÷ \frac{4}{9} =$
$\frac{3}{4} ÷ 0.25 =$
$0.75 ÷ \frac{8}{5} =$

1. $\frac{7}{18}$
$\frac{11}{16}$
2
1
$\frac{1}{16}$
$\frac{1}{3}$
$\frac{1}{6}$
0.2
6
$\frac{1}{30}$
3.5
0.1
$\frac{7}{6}$
$\frac{7}{2}$
$\frac{20}{3}$
$\frac{13}{200}$
$\frac{2}{3}$
$\frac{21}{4}$
3
$\frac{15}{32}$

2. 在□里填上合适的数，再将所填数按从大到小的顺序排列。(12☆)

()＞()＞()＞()

2. 填入的数依次为-4、-3、2、4，从大到小排列为$4＞2＞-3＞-4$

3. 计算下面各题,能简算的要简算。(18☆)
$48×(\dfrac{3}{4}+\dfrac{1}{6}-\dfrac{2}{3})$
$5.87÷0.25÷0.4$
$\dfrac{16}{15}-\dfrac{7}{9}+\dfrac{14}{15}-\dfrac{2}{9}$
$3.9×7.5+0.25×39$
$\dfrac{11}{12}×\dfrac{5}{7}×24×14$
$4×(\dfrac{3}{4}+\dfrac{1}{5})×10$
用时：分钟 共得：☆/50 ☆

3. 12
58.7
1
39
220
38