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信息發(fā)布者：
最簡分數(shù)有：?$\frac {2}{3}，$??$\frac {7}{18}，$??$\frac {31}{91}；$?
?$\frac {12}{16}=\frac {3}{4}，$??$\frac {12}{10}=\frac {6}{5}，$??$\frac {6}{30}=\frac {1}{5}$?
3
$\frac{1}{6}$
$\frac{1}{8}，$$\frac{3}{8}，$$\frac{5}{8}，$$\frac{7}{8}$
$\frac{8}{1}，$$\frac{8}{3}，$$\frac{8}{5}，$$\frac{8}{7}$
$\frac{1}{4}$
$\frac{1}{3}$
$\frac{3}{10}$
$\frac{2}{5}$
$\frac{1}{40}$
B
C
C
?$12 - 8 + 5 = 9($?小時?$)，$?
?$9÷24 = \frac {9}{24} = \frac {3}{8}$?
答：她今天有?$\frac {3}{8}$?的時間在醫(yī)院。
?$52÷80 = \frac {52}{80} = \frac {13}{20}，$?
?$80 - 52 = 28，$?
?$28÷80 = \frac {28}{80}= \frac {7}{20}$?
答：已經(jīng)傳輸?shù)暮臀磦鬏數(shù)姆謩e占文件總量
的?$\frac {13}{20}，\frac {7}{20}。$?
?$30÷65 = \frac {30}{65} = \frac {6}{13}，$?
?$15÷65 = \frac {15}{65} = \frac {3}{13}，$?
?$20÷65 = \frac {20}{65} = \frac {4}{13}$?
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