一、口算。(每题1分,共24分)
$2 - 75\% =$
$1 ÷ 25\% =$
$(\frac{5}{6} + \frac{1}{6}) × 75\% =$
$22 × \frac{5}{11} =$
$32 ÷ \frac{4}{9} =$
$\frac{3}{8} × \frac{4}{9} × \frac{2}{9} ÷ \frac{4}{9} =$
$30\% + 60\% =$
$13 ÷ \frac{1}{5} =$
$2826 ÷ 3.14 ÷ 2 =$
$49 × \frac{5}{28} =$
$1.7 × \frac{8}{17} =$
$3.14 × 5^2 × 8 =$
$35 ÷ 70\% =$
$\frac{18}{19} ÷ 0.9 =$
$2000 × 3\% × 2\% =$
$5^2 - 4^2 =$
$\frac{2}{7} ÷ \frac{9}{14} =$
$3.14 × 8 - 3.14 × 6 =$
$44 × 10\% =$
$94.2 ÷ 3.14 =$
$3.14 × (10 - 7)^2 =$
$9.2\% × 2 =$
$2.4 × \frac{5}{12} =$
$80 ÷ 25\% + 300 =$
$2 - 75\% =$
$1 ÷ 25\% =$
$(\frac{5}{6} + \frac{1}{6}) × 75\% =$
$22 × \frac{5}{11} =$
$32 ÷ \frac{4}{9} =$
$\frac{3}{8} × \frac{4}{9} × \frac{2}{9} ÷ \frac{4}{9} =$
$30\% + 60\% =$
$13 ÷ \frac{1}{5} =$
$2826 ÷ 3.14 ÷ 2 =$
$49 × \frac{5}{28} =$
$1.7 × \frac{8}{17} =$
$3.14 × 5^2 × 8 =$
$35 ÷ 70\% =$
$\frac{18}{19} ÷ 0.9 =$
$2000 × 3\% × 2\% =$
$5^2 - 4^2 =$
$\frac{2}{7} ÷ \frac{9}{14} =$
$3.14 × 8 - 3.14 × 6 =$
$44 × 10\% =$
$94.2 ÷ 3.14 =$
$3.14 × (10 - 7)^2 =$
$9.2\% × 2 =$
$2.4 × \frac{5}{12} =$
$80 ÷ 25\% + 300 =$
答案
25
4
$\frac{3}{4}$
10
72
$\frac{1}{12}$
0.9
65
450
$\frac{35}{4}$
0.8
628
50
$\frac{20}{19}$
1.2
9
$\frac{4}{9}$
6.28
4.4
30
28.26
0.184
1
620
4
$\frac{3}{4}$
10
72
$\frac{1}{12}$
0.9
65
450
$\frac{35}{4}$
0.8
628
50
$\frac{20}{19}$
1.2
9
$\frac{4}{9}$
6.28
4.4
30
28.26
0.184
1
620
二、连一连。(共10分)

答案
三、填表。(每空1分,共15分)

答案
0.7 70% 七折
$\frac{27}{50}$ 54% 五四折
$\frac{9}{25}$ 0.36 三六折
0.65 65% 六五折
$\frac{21}{25}$ 84% 八四折
$\frac{27}{50}$ 54% 五四折
$\frac{9}{25}$ 0.36 三六折
0.65 65% 六五折
$\frac{21}{25}$ 84% 八四折
四、找规律填数。(每空2分,共18分)
1. $\frac{8}{3},\frac{4}{3},\frac{2}{3},(\quad),\frac{1}{6},(\quad),(\quad)$。
2. $\frac{1}{80},\frac{1}{40},(\quad),(\quad),\frac{1}{5},(\quad),\frac{4}{5}$。
1. $\frac{8}{3},\frac{4}{3},\frac{2}{3},(\quad),\frac{1}{6},(\quad),(\quad)$。
2. $\frac{1}{80},\frac{1}{40},(\quad),(\quad),\frac{1}{5},(\quad),\frac{4}{5}$。
答案
1. $\frac{1}{3}$ $\frac{1}{12}$ $\frac{1}{24}$
2. $\frac{1}{20}$ $\frac{1}{10}$ $\frac{2}{5}$
2. $\frac{1}{20}$ $\frac{1}{10}$ $\frac{2}{5}$
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