第67页

信息发布者:
6
$\frac{6}{7}$
4
$\frac{4}{9}$
$\frac{2}{9}+\frac{4}{9}=\frac{6}{9}$
$\frac{6}{10}-\frac{3}{10}=\frac{3}{10}$
$\frac{3}{7}$
$\frac{7}{8}$
$\frac{3}{6}$
$\frac{2}{5}$
$\frac{4}{10}$
$\frac{4}{9}$
$\frac{3}{5}-\frac{2}{5}=\frac{1}{5}$
答:歼-16加了油舱中油的$\frac{1}{5}。$
$\frac{3}{8}-\frac{2}{8}=\frac{1}{8}$
答:写春联比剪窗花少用去这张红纸的$\frac{1}{8}。$
$\frac{2}{8}+\frac{2}{8}=\frac{4}{8}$
答:包红包和写春联一共用去这张红纸的$\frac{4}{8}。$
$\frac{5}{8}$