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计算下面各题，怎样简便就怎样计算。
$5.4\times3.99 + 6.01\times5.4$ $4.3 - 3.79 + 9.7 - 6.21$ $(\frac{3}{4}+\frac{2}{23})\times8+\frac{7}{23}$
$2.5\times32\times12.5$ $\frac{7}{12}\div\frac{3}{4}+\frac{5}{12}\times\frac{4}{3}$ $27.5\times72 + 72.5\times72$
$32.6\div0.25\div0.4$ $5\times(\frac{1}{5}+\frac{2}{17})\times17$ $(80\% + 8\%)\times2.5 + 21$
$125\times(8 + 80\% + 8\%)$ $\frac{1}{6}\times(\frac{3}{5}+48\times\frac{1}{8})$ $279 - 2.4\times75 - 79$
$3.4\times\frac{3}{4}+8.6\times75\%$ $1250 + 780\div30\times25$ $3.35\times99\times2 + 6.7$
$5.4\times3.99 + 6.01\times5.4$ $4.3 - 3.79 + 9.7 - 6.21$ $(\frac{3}{4}+\frac{2}{23})\times8+\frac{7}{23}$
$2.5\times32\times12.5$ $\frac{7}{12}\div\frac{3}{4}+\frac{5}{12}\times\frac{4}{3}$ $27.5\times72 + 72.5\times72$
$32.6\div0.25\div0.4$ $5\times(\frac{1}{5}+\frac{2}{17})\times17$ $(80\% + 8\%)\times2.5 + 21$
$125\times(8 + 80\% + 8\%)$ $\frac{1}{6}\times(\frac{3}{5}+48\times\frac{1}{8})$ $279 - 2.4\times75 - 79$
$3.4\times\frac{3}{4}+8.6\times75\%$ $1250 + 780\div30\times25$ $3.35\times99\times2 + 6.7$
答案
54 4 7
1000 $\frac{4}{3}$ 7200
326 27 23.2
1110 $1\frac{1}{10}$ 20
9 1900 670
1000 $\frac{4}{3}$ 7200
326 27 23.2
1110 $1\frac{1}{10}$ 20
9 1900 670
