19.直接写得数.
0 157898 157906 157912 157916 157922 157924 157928 157934 157936 157942 157948 157952 157954 157958 157964 157966 157972 157976 157978 157982 157984 157988 157990 157992 157993 157994 157996 157997 157998 158000 158002 158006 158008 158012 158014 158018 158024 158026 158032 158036 158038 158042 158048 158054 158056 158062 158066 158068 158074 158078 158084 158092 199269
11-$\frac{5}{8}$= | 0.64÷0.08= | $\frac{1}{2}$÷50%= |
62= | $\frac{14}{29}$÷$\frac{21}{87}$= | 2.6×0.25×4= |