第48页 - 通城学典课时作业本五年级数学苏教版江苏专用

$\frac {2}{3} $、$ \frac {4}{6} $、$ \frac {6}{9} $、$ \frac {12}{18}$

$\frac {1}{3}$

$\frac {1}{8}$

$\frac {3}{2}$

$\frac {5}{18}=\frac {10}{36}$

$ \frac {7}{12}=\frac {21}{36}$

$ \frac {10}{36}＜\frac {21}{36} $，$\frac {5}{18}＜\frac {7}{12}$

$\frac {4}{5}=\frac {48}{60} $

$\frac {7}{12}=\frac {35}{60}$

$ \frac {3}{4}=\frac {45}{60} $

$\frac {48}{60}＞\frac {45}{60}＞\frac {35}{60}$

$ \frac {4}{5}＞\frac {3}{4}＞\frac {7}{12}$

10

64

0.625

＞

＜

4

9

1

5

35

7

$\frac {64}{60}$

$\frac {16}{15}$

1.8

9

5

25

1

4

6250

0.625

$\frac {2}{5}=\frac {112}{280} $，$\frac {4}{7}=\frac {160}{280} $

$\frac {5}{8}=\frac {175}{280}$

$ $因为$\frac {112}{280}＜\frac {160}{280}＜\frac {175}{280}$

所以$\frac {2}{5}＜\frac {4}{7}＜\frac {5}{8}$，月月走得最快

$(5×3.2)÷85=\frac {16}{85}$

$ \frac {16}{85}＜\frac {1}{5} $，不符合要求

2

5

8

11