科目: 來源: 題型:解答題
7.計算下面各題.
$\frac{9}{10}$×$\frac{13}{17}$+$\frac{9}{10}$×$\frac{4}{17}$
$\frac{3}{5}$×$\frac{1}{8}$×$\frac{8}{3}$
$\frac{4}{5}$×$\frac{1}{6}$×$\frac{2}{5}$.
$\frac{9}{10}$×$\frac{13}{17}$+$\frac{9}{10}$×$\frac{4}{17}$
$\frac{3}{5}$×$\frac{1}{8}$×$\frac{8}{3}$
$\frac{4}{5}$×$\frac{1}{6}$×$\frac{2}{5}$.
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