一、直接写出得数。（共32分）
$\frac{1}{8} ÷ \frac{1}{3} =$
$2.52 - 1.8 =$
$\frac{3}{25} × \frac{5}{12} =$
$1 + \frac{1}{4} + \frac{3}{8} =$
$\frac{5}{8} × \frac{2}{3} =$
$78 ÷ \frac{26}{27} =$
$3 ÷ 0.5 =$
$(69 + 27) ÷ 3 =$
$1 - 0.82 =$
$3.6 ÷ 0.5 =$
$\frac{7}{8} ÷ 16 =$
$0.9 + 0.1 ÷ 5 =$
$0.8 × 1.5 =$
$1000 - 799 =$
$\frac{5}{7} ÷ 25 =$
$( \frac{3}{5} - \frac{1}{4} ) × 100 =$
$4.8 ÷ 0.16 =$
$8.4 ÷ 8 =$
$251.2 ÷ 3.14 =$
$32 × 0.25 × 40 =$
$\frac{6}{25} × \frac{5}{18} =$
$\frac{8}{9} - \frac{5}{7} =$
$\frac{4}{27} ÷ \frac{2}{3} =$
$\frac{7}{25} × \frac{5}{4} × \frac{3}{7} =$
$2.1 ÷ 1.4 =$
$5.4 ÷ 20 =$
$\frac{6}{7} ÷ \frac{12}{35} =$
$0 ÷ 5 × \frac{3}{5} =$
$50 × 0.16 =$
$24 ÷ 0.3 =$
$0 ÷ \frac{3}{5} =$
$\frac{1}{9} + \frac{1}{9} ÷ \frac{1}{9} + \frac{1}{9} =$

$\frac{3}{8}$
$0.72$
$\frac{1}{20}$
$1\frac{5}{8}$
$\frac{5}{12}$
$81$
$6$
$32$
$0.18$
$7.2$
$\frac{7}{128}$
$0.92$
$1.2$
$201$
$\frac{1}{35}$
$35$
$30$
$1.05$
$80$
$320$
$\frac{1}{15}$
$\frac{11}{63}$
$\frac{2}{9}$
$\frac{3}{20}$
$1.5$
$0.27$
$\frac{5}{2}$
$0$
$8$
$80$
$0$
$\frac{11}{9}$

二、用竖式计算，带☆的要验算。（共11分）
☆0.45×1.32=
8.09÷7.74≈
☆6.72÷2.8=
（得数保留两位小数）

$0.594$
$1.05$
$2.4$
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）
1. $25×64×2.5$
$(\dfrac{6}{7}×\dfrac{3}{8}-\dfrac{1}{8})÷\dfrac{5}{16}$
$3.72×3.5+62.8×0.35$
$95.5 - 81÷7.5 - 9.2$
$\dfrac{1}{9}÷(\dfrac{7}{9}-\dfrac{2}{7}×\dfrac{14}{9})$
$\dfrac{9}{20}÷[\dfrac{1}{2}×(\dfrac{4}{5}+\dfrac{2}{5})]$

1. $200$
$\frac{22}{35}$
$35$
$75.5$
$\frac{1}{3}$
$\frac{3}{4}$