电子课本网 第61页

第61页

信息发布者:
​$\begin {aligned}&\frac {7}{9}=\frac {14}{18},\frac {5}{6}=\frac {15}{18}\\&\frac {14}{18}<\frac {15}{18},\frac {7}{9}<\frac {5}{6}\end {aligned}$​
​$\begin {aligned}&\frac {1}{12}=\frac {4}{48},\frac {7}{16}=\frac {21}{48}\\&\frac {4}{48}<\frac {21}{48},\frac {1}{12}<\frac {7}{16}\end {aligned}$​
​$\begin {aligned}&\frac {7}{18}=\frac {14}{36},\frac {11}{36}=\frac {11}{36}\\&\frac {14}{36}>\frac {11}{36},\frac {7}{18}>\frac {11}{36}\end {aligned}$​
​$\begin {aligned}&\frac {13}{24}=\frac {39}{72},\frac {17}{18}=\frac {68}{72}\\&\frac {39}{72}<\frac {68}{72},\frac {13}{24}<\frac {17}{18}\end {aligned}$​
​$\frac {2}{5},\frac {4}{9},\frac {1}{3},\frac {5}{12}$​
​$\frac {6}{19}$​
​$\frac {3}{4},\frac {5}{6},\frac {6}{11},\frac {7}{10}$​
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B
C
C
C
答:橙汁要多进。因为​$ \frac {3}{10}=\frac {18}{60},$​​$\frac {8}{15}=\frac {32}{60},$​​$\frac {7}{12}=\frac {35}{60},$​
​$\frac {35}{60} >\frac {32}{60} > \frac {18}{60}$​
即​$ \frac {7}{12} > \frac {8}{15} > \frac {3}{10},$​所以橙汁要多进。
小红:​$\frac {2}{5}$​ 
小芳:1-​$\frac {4}{7}$​=​$\frac {3}{7}$​ 
小丽:​$\frac {4}{4+6}$​=​$\frac {2}{5}$​
​$\frac {3}{7}$​ > ​$\frac {2}{5}$​
答:现在小芳看的页数最多。
B