脱式计算。（能简算的要简算）
$ 48.3 - 15\frac{1}{6} - 4\frac{5}{6} $
$ 9\frac{5}{6} × 4.25 + 4\frac{1}{4} ÷ 6 $
$ 31\frac{3}{8} × 72\frac{5}{13} ÷ 31\frac{3}{8} $
$ 2.5 × (\frac{9}{10} + \frac{9}{10} + \frac{9}{10} + \frac{9}{10}) $
$ 0.625 × 0.5 + \frac{5}{8} + \frac{1}{2} × 62.5\% $
$ 25 × \frac{1}{18} + 48 × 12.5\% + 11 × \frac{1}{18} $
$ 1 + 2 + 3 + ··· + 98 + 99 + 100 $
$ 3.8 × 4.2 + 38 × 0.58 $
$ 2006 × 14 - 200.6 × 50 + 20060 × 0.1 $
$ 125 ÷ (50 ÷ 8) $

$48.3 - 15\frac{1}{6} - 4\frac{5}{6}$
$=48.3 - (15\frac{1}{6} + 4\frac{5}{6})$
$=48.3 - 20$
$=28.3$
$9\frac{5}{6} × 4.25 + 4\frac{1}{4} ÷ 6$
$=9\frac{5}{6}×4.25 + 4.25×\frac{1}{6}$
$=4.25×(9\frac{5}{6}+\frac{1}{6})$
$=4.25×10$
$=42.5$
$31\frac{3}{8} × 72\frac{5}{13} ÷ 31\frac{3}{8}$
$=31\frac{3}{8}÷31\frac{3}{8}×72\frac{5}{13}$
$=1×72\frac{5}{13}$
$=72\frac{5}{13}$
$2.5 × (\frac{9}{10} + \frac{9}{10} + \frac{9}{10} + \frac{9}{10})$
$=2.5×(\frac{9}{10}×4)$
$=2.5×4×\frac{9}{10}$
$=10×0.9$
$=9$
$0.625 × 0.5 + \frac{5}{8} + \frac{1}{2} × 62.5\%$
$=0.625×0.5 + 0.625 + 0.5×0.625$
$=0.625×(0.5+1+0.5)$
$=0.625×2$
$=1.25$
$25 × \frac{1}{18} + 48 × 12.5\% + 11 × \frac{1}{18}$
$=(25+11)×\frac{1}{18} + 48×\frac{1}{8}$
$=36×\frac{1}{18} + 6$
$=2 + 6$
$=8$
$1 + 2 + 3 + ··· + 98 + 99 + 100$
$=(1+100)×100÷2$
$=101×50$
$=5050$
$3.8 × 4.2 + 38 × 0.58$
$=3.8×4.2 + 3.8×5.8$
$=3.8×(4.2+5.8)$
$=3.8×10$
$=38$
$2006 × 14 - 200.6 × 50 + 20060 × 0.1$
$=2006×14 - 2006×5 + 2006×1$
$=2006×(14-5+1)$
$=2006×10$
$=20060$
$125 ÷ (50 ÷ 8)$
$=125÷50×8$
$=125×8÷50$
$=1000÷50$
$=20$