9.神机妙算细又巧
$\frac{1}{9}$×10÷$\frac{5}{9}$ | $\frac{7}{10}$×$\frac{5}{16}$÷$\frac{21}{32}$ | $\frac{3}{8}$÷$\frac{7}{16}$÷$\frac{1}{7}$ | $\frac{7}{18}$÷$\frac{1}{6}$×$\frac{10}{21}$ |
8.计算比值我能行
0 153954 153962 153968 153972 153978 153980 153984 153990 153992 153998 154004 154008 154010 154014 154020 154022 154028 154032 154034 154038 154040 154044 154046 154048 154049 154050 154052 154053 154054 154056 154058 154062 154064 154068 154070 154074 154080 154082 154088 154092 154094 154098 154104 154110 154112 154118 154122 154124 154130 154134 154140 154148 199269
$\frac{1}{3}$﹕$\frac{2}{5}$ | 0.8﹕1.2 | 1﹕0.75 | $\frac{64}{4}$ |