9.小红和小军各有一些邮票,小军的邮票是小红的$\frac{6}{7}$,如果小红拿出6张邮票给小军两人邮票就一样多,原来小红有多少张邮票?正确的算式是( )
A. | 6×2÷(1-$\frac{6}{7}$) | B. | 6÷(1-$\frac{6}{7}$) | C. | 6÷2÷(1-$\frac{6}{7}$) |
8.六(1)班男生占全班人数的$\frac{11}{21}$,则女生占男生的( )
0 159711 159719 159725 159729 159735 159737 159741 159747 159749 159755 159761 159765 159767 159771 159777 159779 159785 159789 159791 159795 159797 159801 159803 159805 159806 159807 159809 159810 159811 159813 159815 159819 159821 159825 159827 159831 159837 159839 159845 159849 159851 159855 159861 159867 159869 159875 159879 159881 159887 159891 159897 159905 199269
A. | $\frac{11}{10}$ | B. | $\frac{10}{11}$ | C. | $\frac{10}{21}$ |