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一、用竖式计算，带*的要验算。
$925 - 486$ $7.82\div0.23$ $*40.5\times0.34$
$81.9 + 1.81$ $30.4\times4.8$ $*812\div23$
$925 - 486$ $7.82\div0.23$ $*40.5\times0.34$
$81.9 + 1.81$ $30.4\times4.8$ $*812\div23$
答案
439 34 13.77 83.71 145.92 35……7
二、计算下面各题。
$2315 + 780\div30\times25$ $(1 - 10\%\times8)\div\frac{1}{15}$ $7.2\div(9.79 + 4.61)\times4.8$
$45\times(1 - \frac{4}{9})\div\frac{5}{24}$ $168.1\div(4.3\times2 - 0.4)$ $60\%\div(\frac{7}{8} - \frac{3}{8} - 40\%)$
$2.4\div0.75 + 14.4\div2.4$ $\frac{8}{15}\times[\frac{5}{6}\div(\frac{7}{9} - \frac{1}{3})]$ $(1 - \frac{1}{60}\times20)\div20$
$2315 + 780\div30\times25$ $(1 - 10\%\times8)\div\frac{1}{15}$ $7.2\div(9.79 + 4.61)\times4.8$
$45\times(1 - \frac{4}{9})\div\frac{5}{24}$ $168.1\div(4.3\times2 - 0.4)$ $60\%\div(\frac{7}{8} - \frac{3}{8} - 40\%)$
$2.4\div0.75 + 14.4\div2.4$ $\frac{8}{15}\times[\frac{5}{6}\div(\frac{7}{9} - \frac{1}{3})]$ $(1 - \frac{1}{60}\times20)\div20$
答案
2965 3 2.4 120 20.5 6 9.2 1 $\frac{1}{30}$
