一、直接写出得数。（共32分）
$66 + 44 =$
$5.4 ÷ 0.09 =$
$0.77 + 3.3 =$
$5.2 - (2.6 - 0.8) =$
$4.8 ÷ 0.16 =$
$5 ÷ 500 =$
$64.8 ÷ 8 =$
$4.2 × 0.2 × 5 =$
$7.7 ÷ 0.77 =$
$0.1 × 800 =$
$4.5 ÷ 0.45 =$
$0.78 × 9 + 0.78 =$
$40 × 0.02 =$
$515 - 225 =$
$1.02 - 0.2 =$
$1.8 ÷ 0.1 × 10 =$
$36 ÷ \frac{4}{9} =$
$\frac{1}{4} + \frac{7}{4} =$
$\frac{7}{8} ÷ \frac{1}{8} =$
$\frac{5}{6} + \frac{1}{6} × 2 =$
$9.7 + \frac{3}{10} =$
$\frac{7}{8} - \frac{1}{4} =$
$\frac{14}{15} × \frac{30}{7} =$
$7.2 ÷ 0.6 × \frac{3}{10} =$
$12.5 × \frac{4}{5} =$
$0.65 × \frac{1}{2} =$
$24 ÷ \frac{3}{25} =$
$\frac{20}{21} × \frac{7}{10} + \frac{2}{3} =$
$\frac{9}{20} ÷ 5 =$
$0.8 ÷ \frac{5}{4} =$
$0.75 ÷ \frac{1}{10} =$
$\frac{5}{7} ÷ \frac{1}{2} ÷ 10 =$

110 60 4.07 3.4
30 0.01 8.1 4.2
10 80 10 7.8
0.8 290 0.82 180
81 2 7 $\frac{7}{6}$
10 $\frac{5}{8}$ 4 $\frac{18}{5}$
10 0.325 200 $\frac{4}{3}$
$\frac{9}{100}$ 0.64 7.5 $\frac{1}{7}$

二、用竖式计算，带☆的要验算。（共20分）
6.08×6.5=
☆18.15÷33=
24.4÷0.74≈
（得数保留一位小数）
1.74×1.6=
0.35×4.7≈
（得数保留一位小数）
☆0.988÷0.13=

39.52 0.55 33.0
2.784 1.6 7.6
竖式及验算略

三、计算下面各题，怎样算简便就怎样算。（共24分）
$25×800.8$
$0.29×9.9+2.9×0.01$
$64.8÷[3.9-(1.7+0.04)]$
$\frac{2}{3}+\frac{5}{8}×\frac{7}{10}÷\frac{7}{24}$
$\frac{4}{5}÷3+\frac{2}{3}×0.8$
$\frac{1}{6}÷[\frac{9}{17}×(\frac{3}{4}+\frac{2}{3})]$

20020 2.9 30
$\frac{13}{6}$ $\frac{4}{5}$ $\frac{2}{9}$