① 将下列分数化简为最简分数。(每题1分,共10分)
$\frac{6}{18}=$
$\frac{26}{91}=$
$\frac{6}{24}=$
$\frac{15}{50}=$
$\frac{10}{24}=$
$\frac{52}{80}=$
$\frac{25}{35}=$
$\frac{18}{24}=$
$\frac{6}{9}=$
$\frac{12}{72}=$

$\frac{6}{18}=\frac{1}{3}$
$\frac{26}{91}=\frac{2}{7}$
$\frac{6}{24}=\frac{1}{4}$
$\frac{15}{50}=\frac{3}{10}$
$\frac{10}{24}=\frac{5}{12}$
$\frac{52}{80}=\frac{13}{20}$
$\frac{25}{35}=\frac{5}{7}$
$\frac{18}{24}=\frac{3}{4}$
$\frac{6}{9}=\frac{2}{3}$
$\frac{12}{72}=\frac{1}{6}$

② 先将下面的分数约分,再把这些数按从大到小的顺序排列。(每空1分,共10分)
$\frac{45}{54}=(\quad)$ $\frac{14}{42}=(\quad)$ $\frac{4}{36}=(\quad)$ $\frac{12}{63}=(\quad)$ $\frac{9}{36}=(\quad)$
$(\quad)＞(\quad)＞(\quad)＞(\quad)＞(\quad)$

$\frac{45}{54}=\frac{5}{6}$ $\frac{14}{42}=\frac{1}{3}$ $\frac{4}{36}=\frac{1}{9}$ $\frac{12}{63}=\frac{4}{21}$ $\frac{9}{36}=\frac{1}{4}$
$\frac{45}{54}＞\frac{14}{42}＞\frac{9}{36}＞\frac{12}{63}＞\frac{4}{36}$

③ 计算。(每题3分,共18分)
$96.5÷1.25÷8$
$9.27-(3.5+1.27)$
$9.27×8.5+0.73×8.5$
$5.59-0.87-0.59$
$333×334+999×222$
$0.25×32×0.125$

9.65
4.5
85
4.13
333000
1

④ 解方程。(每题4分,共12分)
$5.5x - 1.3x = 12.6$
$1.3x + 2.7x = 0.28$
$x ÷ 4.8 = 0.45$

解:$x=3$
解:$x=0.07$
解:$x=2.16$