二、计算下面各题,怎样简便就怎样计算。
$ 30 - (4 - 0.25) ÷ 1.5 $
$ \frac{1}{5} + \frac{7}{20} ÷ \frac{7}{10} - \frac{1}{8} $
$ 5.6 × 7.8 + 5.6 × 1.2 + 5.6 $
$ 450 × (\frac{2}{3} + \frac{7}{15} - \frac{3}{5}) $
$ \frac{4}{5} ÷ 3 + \frac{2}{3} × \frac{4}{5} $
$ 36.4 - (8.4 + 3.75 ÷ 0.375) $
$ (27.6 - 0.9) ÷ 2.5 ÷ 4 $
$ 2 ÷ (\frac{1}{10} + \frac{1}{12} + \frac{1}{15}) $
$ 0.04 × [20.4 ÷ (4.3 + 0.8)] $
$ \frac{1}{14} × \frac{7}{11} + \frac{4}{11} ÷ 14 $
$ \frac{3}{8} ÷ [(\frac{1}{3} - 25\%) × 24] $
$ (\frac{7}{8} - \frac{5}{16}) × (\frac{5}{9} + \frac{2}{3}) - \frac{3}{8} $
$ 65\% × \frac{1}{9} + 35\% ÷ 9 $
$ 0.89 × 100.1 - 0.089 $
$ 80\% ÷ [(\frac{5}{8} - \frac{1}{2}) ÷ \frac{5}{6}] $
$ 30 - (4 - 0.25) ÷ 1.5 $
$ \frac{1}{5} + \frac{7}{20} ÷ \frac{7}{10} - \frac{1}{8} $
$ 5.6 × 7.8 + 5.6 × 1.2 + 5.6 $
$ 450 × (\frac{2}{3} + \frac{7}{15} - \frac{3}{5}) $
$ \frac{4}{5} ÷ 3 + \frac{2}{3} × \frac{4}{5} $
$ 36.4 - (8.4 + 3.75 ÷ 0.375) $
$ (27.6 - 0.9) ÷ 2.5 ÷ 4 $
$ 2 ÷ (\frac{1}{10} + \frac{1}{12} + \frac{1}{15}) $
$ 0.04 × [20.4 ÷ (4.3 + 0.8)] $
$ \frac{1}{14} × \frac{7}{11} + \frac{4}{11} ÷ 14 $
$ \frac{3}{8} ÷ [(\frac{1}{3} - 25\%) × 24] $
$ (\frac{7}{8} - \frac{5}{16}) × (\frac{5}{9} + \frac{2}{3}) - \frac{3}{8} $
$ 65\% × \frac{1}{9} + 35\% ÷ 9 $
$ 0.89 × 100.1 - 0.089 $
$ 80\% ÷ [(\frac{5}{8} - \frac{1}{2}) ÷ \frac{5}{6}] $
答案
$27.5$ $\frac{23}{40}$ $56$
$240$ $\frac{4}{5}$ $18$
$2.67$ $8$ $0.16$
$\frac{1}{14}$ $\frac{3}{16}$ $\frac{5}{16}$
$\frac{1}{9}$ $89$ $\frac{16}{3}$
$240$ $\frac{4}{5}$ $18$
$2.67$ $8$ $0.16$
$\frac{1}{14}$ $\frac{3}{16}$ $\frac{5}{16}$
$\frac{1}{9}$ $89$ $\frac{16}{3}$
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