一、口算。（每题1分，共32分）
$\frac{7}{15}×\frac{25}{14}=$ $\frac{3}{11}×\frac{1}{4}=$ $\frac{17}{18}×3=$ $\frac{3}{50}×2.5=$
$\frac{19}{50}×\frac{10}{19}=$ $\frac{11}{24}×4.8=$ $\frac{5}{39}×1.3=$ $\frac{7}{15}×\frac{3}{14}=$
$\frac{15}{98}×7=$ $\frac{5}{24}×\frac{4}{15}=$ $0.5×\frac{13}{10}=$ $\frac{7}{8}×0.24=$
$\frac{3}{5}×\frac{15}{17}=$ $\frac{7}{9}×\frac{7}{5}=$ $\frac{4}{15}×5=$ $\frac{1}{8}×\frac{1}{9}=$
$\frac{3}{34}×17=$ $\frac{5}{12}×2.4=$ $\frac{2}{5}×\frac{5}{4}=$ $\frac{9}{10}×\frac{9}{10}=$
$12×\frac{7}{12}=$ $\frac{6}{5}×\frac{8}{5}=$ $\frac{3}{14}×\frac{7}{6}=$ $\frac{3}{5}×\frac{5}{6}=$
$\frac{7}{18}×\frac{16}{7}=$ $\frac{23}{49}×\frac{7}{46}=$ $\frac{19}{5}×\frac{25}{38}=$ $\frac{1}{5}×\frac{5}{6}=$
$\frac{1}{7}×\frac{2}{5}=$ $\frac{5}{16}×48=$ $\frac{3}{8}×3.2=$ $\frac{16}{7}×\frac{11}{48}=$

$\frac{5}{6}$ $\frac{3}{44}$ $\frac{17}{6}$ $0.15$
$\frac{1}{5}$ $2.2$ $\frac{1}{6}$ $\frac{1}{10}$
$\frac{15}{14}$ $\frac{1}{18}$ $\frac{13}{20}$ $0.21$
$\frac{9}{17}$ $\frac{49}{45}$ $\frac{4}{3}$ $\frac{1}{72}$
$\frac{3}{2}$ $1$ $\frac{1}{2}$ $\frac{81}{100}$
$7$ $\frac{48}{25}$ $\frac{1}{4}$ $\frac{1}{2}$
$\frac{8}{9}$ $\frac{1}{14}$ $\frac{5}{2}$ $\frac{1}{6}$
$\frac{2}{35}$ $15$ $\frac{6}{5}$ $\frac{11}{21}$

二、在○里填上“＞”“＜”或“=”。（每题1分，共7分）
$\frac{7}{8}×\frac{4}{5} ◯ \frac{7}{8}$
$\frac{4}{7}×2 ◯ \frac{4}{7}+\frac{4}{7}$
$\frac{7}{10}×\frac{6}{5} ◯ \frac{6}{5}$
$\frac{3}{11}×0.5 ◯ \frac{3}{11}×\frac{1}{2}$
$\frac{1}{3}×\frac{5}{6} ◯ \frac{2}{3}×\frac{4}{5}$
$\frac{4}{11}×\frac{4}{5} ◯ \frac{4}{11}×(1-\frac{1}{5})$
$28×(\frac{2}{7}+\frac{3}{14}) ◯ 28×\frac{2}{7}+\frac{3}{14}$

$＜$ $=$ $＜$
$=$ $＜$
$=$ $＞$

三、在()里填上合适的数。(每空2分,共22分)
$\frac{7}{30}$时=()分
$\frac{3}{4}$m=()cm
$\frac{1}{4}$L=()mL
$\frac{9}{10}$元=()角
$\frac{2}{5}$公顷=()平方米
$3\frac{5}{8}$t=()t()kg
$2\frac{17}{20}$m²=()m²()dm²
$5\frac{1}{5}$km=()km=()m

14 75
250 9
4000 3 625
2 85 $\frac{26}{5}$ 5200