4．把下面的小数化成分数，分数化成小数．（除不尽的保留三位小数）．
| 0.6 | 0.48 | $\frac{7}{4}$ | $\frac{5}{6}$ | $\frac{9}{16}$ |
3．如图是2根1米长的彩带，图中涂色部分共长（ ）米．
0 137871 137879 137885 137889 137895 137897 137901 137907 137909 137915 137921 137925 137927 137931 137937 137939 137945 137949 137951 137955 137957 137961 137963 137965 137966 137967 137969 137970 137971 137973 137975 137979 137981 137985 137987 137991 137997 137999 138005 138009 138011 138015 138021 138027 138029 138035 138039 138041 138047 138051 138057 138065 199269
| A． | $\frac{1}{4}$ | B． | $\frac{1}{8}$ | C． | $\frac{2}{4}$ | D． | $\frac{2}{8}$ |