第24页

信息发布者：
=5×$\dfrac{6}{5}$+$\dfrac{5}{6}$×$\dfrac{1}{5}$
=6+$\dfrac{1}{6}$
=$6\dfrac{1}{6}$
=$\dfrac{2}{5}$×($\dfrac{6}{11}$+$\dfrac{5}{11}$)
=$\dfrac{2}{5}$×1
=$\dfrac{2}{5}$
=$\dfrac{2}{5}$÷($\dfrac{15}{20}$+$\dfrac{8}{20}$)
=$\dfrac{2}{5}$÷$\dfrac{23}{20}$
=$\dfrac{2}{5}$×$\dfrac{20}{23}$
=$\dfrac{8}{23}$
=$\dfrac{24}{19}$×$\dfrac{1}{8}$+$\dfrac{16}{17}$×$\dfrac{1}{8}$+$\dfrac{15}{17}$
=$\dfrac{3}{19}$+$\dfrac{2}{17}$+$\dfrac{15}{17}$
=$\dfrac{3}{19}$+($\dfrac{2}{17}$+$\dfrac{15}{17}$)
=$\dfrac{3}{19}$+1
=$1\dfrac{3}{19}$
240×(1 - $\dfrac{1}{6}$)
= 240×$\dfrac{5}{6}$
= 200（人）
答：女生有200人。
$\dfrac{3}{5} × (1 + \dfrac{1}{9})$
$=\dfrac{3}{5} × \dfrac{10}{9}$
$=\dfrac{2}{3}$（吨）
答：梨有$\dfrac{2}{3}$吨。
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