第23页

信息发布者:
$\frac{4}{15}$
4
15
$\frac{6}{25}$
$\frac{1}{25}$
$\frac{2}{15}$
$\frac{1}{2}$
$\frac{1}{8}$
$\frac{1}{3}$
$\frac{3}{4}$
$\frac{5}{12}$
B

$1-\frac{1}{4}=\frac{3}{4}\ $
$\frac{3}{4}×\frac{1}{3}=\frac{1}{4}\ $
$\frac{1}{4}=\frac{1}{4},$
$答:小红说得对。$
$\frac{1}{6}$
$\frac{1}{6}$
$\frac{1}{20}$
$\frac{1}{20}$
1
相邻
相等
$\ \frac{1}{a}$
$\frac{1}{a+1}$

$\frac{7}{3}$
$\frac{7}{3}$
$\frac{6}{5}$
$\frac{6}{5}$
$\frac{9}{7}$
$\frac{9}{7}$
$\frac{11}{6}$
$\frac{11}{6}$

$\frac{1}{3}-\frac{1}{4}=\frac{1}{12}$
$\frac{1}{3}×\frac{1}{4}=\frac{1}{12}$
$\frac{1}{6}-\frac{1}{7}=\frac{1}{42}$
$\frac{1}{6}×\frac{1}{7}=\frac{1}{42}$