一、直接写出得数。（共32分）
$3 - 0.64 =$
$16 ÷ 40 =$
$21.6 + 3.04 =$
$36 × 0.1 + 2.4 =$
$0.39 × 2 =$
$8.8 × 0.2 =$
$2.5 × 0.04 =$
$(10.8 - 1.2) ÷ 3 =$
$1.5 ÷ 5 =$
$0.2 × 0.5 =$
$0.24 ÷ 0.6 =$
$33.2 ÷ 0.1 - 128 =$
$4.3 + 1.57 =$
$8 + 2.2 =$
$9.85 - 1.2 =$
$0.9 + 5.1 ÷ 17 =$
$3.33 + 2.13 =$
$0.84 ÷ 4 =$
$7.12 × 2 =$
$10.28 - 3.06 - 6.94 =$
$6.36 - 1.26 =$
$42.3 ÷ 3 =$
$0.1 + 1.99 =$
$(25 + 1.25) × 0.8 =$
$4.8 × \frac{1}{6} =$
$1.5 ÷ \frac{1}{2} =$
$\frac{1}{4} + \frac{1}{7} =$
$\frac{3}{5} + \frac{2}{5} × \frac{5}{6} =$
$\frac{5}{11} × 0.66 =$
$1\frac{1}{3} × \frac{3}{8} =$
$1 ÷ \frac{27}{25} =$
$\frac{4}{7} × \frac{5}{8} ÷ \frac{4}{7} × \frac{3}{8} =$

2.36；0.4；24.64；6
0.78；1.76；0.1；3.2
0.3；0.1；0.4；204
5.87；10.2；8.65；1.2
5.46；0.21；14.24；0.28
5.1；14.1；2.09；21
0.8；3；$\frac{11}{28}$；$\frac{14}{15}$
0.3；$\frac{1}{2}$；$\frac{25}{27}$；$\frac{15}{64}$

二、用竖式计算，带☆的要验算。（共20分）
15.96＋6.47＝ ☆67.6÷0.26＝ 3.14×1.8≈
（得数保留两位小数）
32.4÷24＝ ☆3.25×0.84＝ 18.33÷2.4≈
（得数保留两位小数）

22.43；260；5.65
1.35；2.73；7.64
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）
12.5×9×3.2
11×$( \frac{4}{11} + \frac{5}{13} ) ÷ \frac{1}{13}$
6.3 + 0.84 + 3.7 + 8.16
(2.5 + 0.25)×4 + 1.8
$\frac{29}{17} + 0.52 - ( \frac{12}{17} - 0.48 )$
0.84 ÷ $[ (2.3 + 0.5) × 0.6 ]$

360；107；19
12.8；2；0.5