零五网 › 全部参考答案› 实验班提优训练答案 › 江苏版实验班提优训练数学五年级上下册答案 › 第61页

第61页

信息发布者：

$\begin {aligned}&\frac {7}{9}=\frac {14}{18}，\frac {5}{6}=\frac {15}{18}\\&\frac {14}{18}<\frac {15}{18}，\frac {7}{9}<\frac {5}{6}\end {aligned}$

$\begin {aligned}&\frac {1}{12}=\frac {4}{48}，\frac {7}{16}=\frac {21}{48}\\&\frac {4}{48}<\frac {21}{48}，\frac {1}{12}<\frac {7}{16}\end {aligned}$

$\begin {aligned}&\frac {7}{18}=\frac {14}{36}，\frac {11}{36}=\frac {11}{36}\\&\frac {14}{36}>\frac {11}{36}，\frac {7}{18}>\frac {11}{36}\end {aligned}$

$\begin {aligned}&\frac {13}{24}=\frac {39}{72}，\frac {17}{18}=\frac {68}{72}\\&\frac {39}{72}<\frac {68}{72}，\frac {13}{24}<\frac {17}{18}\end {aligned}$

$\frac {2}{5}，\frac {4}{9}，\frac {1}{3}，\frac {5}{12}$

$\frac {6}{19}$

$\frac {3}{4}，\frac {5}{6}，\frac {6}{11}，\frac {7}{10}$

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。