1. 计算下面各题。
$789 + 960\div15\times13$ $16\times45 - 735\div21$
$666\div(901 - 32\times27)$ $909\times[(118 + 602)\div80]$
$(\frac{1}{2}+\frac{1}{6})\times(\frac{1}{3}-\frac{1}{4})$ $\frac{3}{5}\div[\frac{3}{8}\times(\frac{4}{15}+\frac{2}{5})]$
$789 + 960\div15\times13$ $16\times45 - 735\div21$
$666\div(901 - 32\times27)$ $909\times[(118 + 602)\div80]$
$(\frac{1}{2}+\frac{1}{6})\times(\frac{1}{3}-\frac{1}{4})$ $\frac{3}{5}\div[\frac{3}{8}\times(\frac{4}{15}+\frac{2}{5})]$
答案
2. 用简便方法计算。
$48 + 169 + 52$ $25\times73\times0.4$ $43\times102$
$\frac{4}{9}+\frac{3}{17}+\frac{5}{9}+\frac{4}{17}$ $\frac{7}{18}\times\frac{5}{4}+\frac{11}{18}\div\frac{4}{5}$
$48 + 169 + 52$ $25\times73\times0.4$ $43\times102$
$\frac{4}{9}+\frac{3}{17}+\frac{5}{9}+\frac{4}{17}$ $\frac{7}{18}\times\frac{5}{4}+\frac{11}{18}\div\frac{4}{5}$
答案
