17．直接写出得数
| 20×20%= | $\frac{2}{3}$÷$\frac{1}{6}$= | 1÷0.01= | 25π= |
| 3-$\frac{7}{8}$= | $\frac{3}{4}$×$\frac{3}{5}$= | 4.2-1.8= | 16π= |
16．把一个高60厘米的圆锥体容器装满水，倒入一个和它等底等高的圆柱体容器里．水的高度是（ ）厘米．
0 157825 157833 157839 157843 157849 157851 157855 157861 157863 157869 157875 157879 157881 157885 157891 157893 157899 157903 157905 157909 157911 157915 157917 157919 157920 157921 157923 157924 157925 157927 157929 157933 157935 157939 157941 157945 157951 157953 157959 157963 157965 157969 157975 157981 157983 157989 157993 157995 158001 158005 158011 158019 199269
| A． | 20 | B． | 30 | C． | 60 | D． | 90 |