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1. 直接写出得数。(9分)
$60.1 + 0.02 =$
$0.6 × 0.07 =$
$0.07 × 5 ÷ 7 =$
$0 ÷ \frac{2}{3} =$
$\frac{5}{6} × \frac{4}{15} =$
$1 - \frac{3}{8} + \frac{5}{8} =$
$\frac{1}{4} - \frac{1}{20} =$
$\frac{7}{12} ÷ \frac{7}{9} =$
$6 ÷ \frac{6}{7} - \frac{6}{7} =$
$60.1 + 0.02 =$
$0.6 × 0.07 =$
$0.07 × 5 ÷ 7 =$
$0 ÷ \frac{2}{3} =$
$\frac{5}{6} × \frac{4}{15} =$
$1 - \frac{3}{8} + \frac{5}{8} =$
$\frac{1}{4} - \frac{1}{20} =$
$\frac{7}{12} ÷ \frac{7}{9} =$
$6 ÷ \frac{6}{7} - \frac{6}{7} =$
答案
1. 60.12 0.042 0.05 0 $\frac{2}{9}$ $\frac{5}{4}$ $\frac{1}{5}$ $\frac{3}{4}$ $6\frac{1}{7}$
2. 用竖式计算，带*的要验算。(7分)
5.03×0.26= *0.512÷0.32= 3.56÷0.35≈
(得数保留两位小数)
5.03×0.26= *0.512÷0.32= 3.56÷0.35≈
(得数保留两位小数)
答案
2. 1.3078 1.6 10.17 竖式及验算略
3. 计算下面各题，怎样算简便就怎样算。（12 分）
$27.98 + 2.9 + 4.02 + 3.1$
$6.4 - \frac{3}{10} - ( \frac{7}{10} + 3.6 )$
$( \frac{5}{6} - \frac{3}{8} + \frac{1}{4} ) × 4.8$
$\frac{7}{12} ÷ [ ( \frac{11}{6} - \frac{4}{3} ) × 14 ]$
$27.98 + 2.9 + 4.02 + 3.1$
$6.4 - \frac{3}{10} - ( \frac{7}{10} + 3.6 )$
$( \frac{5}{6} - \frac{3}{8} + \frac{1}{4} ) × 4.8$
$\frac{7}{12} ÷ [ ( \frac{11}{6} - \frac{4}{3} ) × 14 ]$
答案
3. 38 1.8 3.4 $\frac{1}{12}$
4. 计算下面涂色部分的面积。（6分）
(1)
(2)
(1)
(2)
答案
4. (1) $3.14×5^2×\frac{1}{4}-3.14×(5-2)^2×\frac{1}{4}=12.56(\mathrm{dm}^2)$
(2) $(3+6)×4÷2-3.14×(4÷2)^2=5.44(\mathrm{cm}^2)$
(2) $(3+6)×4÷2-3.14×(4÷2)^2=5.44(\mathrm{cm}^2)$
