电子课本网 第58页

第58页

信息发布者:
最简分数有:​$\frac {2}{3},$​​$\frac {7}{18},$​​$\frac {31}{91};$​
​$\frac {12}{16}=\frac {3}{4},$​​$\frac {12}{10}=\frac {6}{5},$​​$\frac {6}{30}=\frac {1}{5}$​
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
​$12 - 8 + 5 = 9($​小时​$),$​
​$9÷24 = \frac {9}{24} = \frac {3}{8}$​
答:她今天有​$\frac {3}{8}$​的时间在医院。
​$52÷80 = \frac {52}{80} = \frac {13}{20},$​
​$80 - 52 = 28,$​
​$28÷80 = \frac {28}{80}= \frac {7}{20}$​
答:已经传输的和未传输的分别占文件总量
的​$\frac {13}{20},\frac {7}{20}。$​
​$30÷65 = \frac {30}{65} = \frac {6}{13},$​
​$15÷65 = \frac {15}{65} = \frac {3}{13},$​
​$20÷65 = \frac {20}{65} = \frac {4}{13}$​