1. 直接写出得数。
$10÷1000=$
$3.6÷0.4=$
$1.5÷0.15=$
$0.125×1.7×8=$
$5.2×0.2=$
$1.5×0.08=$
$0.82+1.8=$
$6÷1.2×8=$
$132+564=$
$4.5÷0.9=$
$9.09÷0.9=$
$10×0.01+0.09=$
$0.36÷0.06=$
$6-0.6=$
$3×0.75=$
$1.6-1.6×0.5=$
$\frac{3}{5}+0.8=$
$\frac{1}{2}×\frac{3}{4}=$
$\frac{2}{5}÷\frac{1}{2}=$
$\frac{7}{9}-(\frac{3}{9}+\frac{1}{4})=$
$\frac{7}{6}×1.5=$
$\frac{7}{8}×\frac{14}{17}=$
$\frac{5}{12}×\frac{3}{40}=$
$\frac{5}{12}×13-\frac{5}{12}=$
$\frac{15}{4}×\frac{1}{30}=$
$\frac{2}{5}×2.5=$
$\frac{1}{18}+\frac{2}{9}=$
$2÷\frac{2}{5}-\frac{2}{5}=$
$\frac{6}{5}+\frac{3}{5}=$
$\frac{1}{17}÷\frac{1}{34}=$
$2.25×\frac{16}{27}=$
$0.7÷\frac{7}{20}×5=$

1. 0.01 9 10 1.7
1.04 0.12 2.62 40
696 5 10.1 0.19
6 5.4 2.25 0.8
$\frac{7}{5}$ $\frac{3}{8}$ $\frac{4}{5}$ $\frac{7}{36}$
$\frac{7}{4}$ $\frac{49}{68}$ $\frac{1}{32}$ 5
$\frac{1}{8}$ 1 $\frac{5}{18}$ $4\frac{3}{5}$
$\frac{9}{5}$ 2 $\frac{4}{3}$ 10

2. 计算下面各题，怎样算简便就怎样算。
$5.8×6.5 + 1.3×40$
$0.42×0.25 + 0.08÷4$
$(62.1 - 57.6)÷1.5 + 4.7$
$\frac{7}{12} + \frac{4}{7}÷\frac{4}{5} + \frac{2}{7}$
$0.99 + 9.1×(\frac{2}{13} - \frac{1}{7})$
$\frac{7}{10}÷[0.5×(\frac{3}{4} - \frac{3}{5})]$

2. 89.7 0.125 7.7
$\frac{19}{12}$ 1.09 $\frac{28}{3}$

把下面的八进制数改写成十进制数。
$(62)_8$
$(560)_8$

$(62)_8=(10)_8×6+(1)_8×2=8×6+1×2=50$
$(560)_8=(100)_8×5+(10)_8×6+(1)_8×0=64×5+8×6+1×0=368$