17.用你喜欢的方法计算(能简算的要简算).
205-105×12÷45 | 1.05×(3.8-0.8)÷6.3 | ($\frac{1}{5}$+$\frac{1}{3}$)÷$\frac{8}{9}$ |
($\frac{1}{4}$+$\frac{2}{9}$)×36 | $\frac{5}{7}÷9+\frac{4}{7}×\frac{1}{9}$ | 0.6×3.3+$\frac{3}{5}$×7.7-60% |
16.直接写出结果.
0 164971 164979 164985 164989 164995 164997 165001 165007 165009 165015 165021 165025 165027 165031 165037 165039 165045 165049 165051 165055 165057 165061 165063 165065 165066 165067 165069 165070 165071 165073 165075 165079 165081 165085 165087 165091 165097 165099 165105 165109 165111 165115 165121 165127 165129 165135 165139 165141 165147 165151 165157 165165 199269
$\frac{1}{3}$÷$\frac{3}{4}$= | 1.25×8= | 3+2-3+2= | ($\frac{1}{4}$-0.25)×$\frac{4}{9}$= |
0.9÷0.01= | 1-0.8= | 100×0.1%= | 49×101= |