三、计算下面各题，怎样简便就怎样计算。（前两题每题2分，其余每题3分，共43分）
$\frac{3}{4}+(\frac{1}{3}-\frac{1}{6})$ $2.5\div1.25\div0.8\times40$ $62.9 + 18.2\div(2.3 - 1.6)$
$\frac{12}{13}+\frac{7}{11}-\frac{12}{13}+\frac{7}{11}$ $(42.8 - 40.5\div7.5)\times16$ $3.072\div[(0.3 + 0.5)\times0.12]$
$\frac{9}{5}-(\frac{2}{7}+\frac{4}{5})-\frac{4}{7}$ $1.45\times9.9 + 14.5\times0.99$ $0.7\times75.7 - 0.7 + 0.7\times25.3$
$\frac{4}{7}-\frac{1}{18}+\frac{5}{7}-\frac{17}{18}$ $6.8\times(0.35 + 0.5\times4)$ $64.8\div[(3.5 - 2.9)\times0.9]$
$\frac{13}{6}-(\frac{3}{4}-\frac{5}{12}+\frac{1}{3})$ $9.99\div(50\times1.11)+299$ $[8+(0.5 - 0.2)]\times0.24$