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二、计算下面各题。
$\frac {5}{8}÷10×\frac {14}{15}$ $\frac {5}{3}×\frac {27}{2}÷25$ $\frac {1}{6}÷\frac {1}{3}÷\frac {1}{2}$
$\frac {15}{7}÷\frac {7}{9}÷\frac {5}{14}$ $\frac {6}{7}×\frac {5}{7}÷\frac {3}{2}$ $12÷\frac {3}{8}×\frac {5}{2}$
$\frac {16}{5}×\frac {3}{8}×15$ $\frac {25}{9}÷\frac {5}{4}÷\frac {4}{5}$ $\frac {5}{8}÷\frac {7}{40}×\frac {7}{20}$
$12÷\frac {2}{5}×\frac {8}{25}$ $\frac {9}{8}×\frac {10}{3}×\frac {1}{9}$ $\frac {3}{7}÷\frac {5}{7}×\frac {3}{2}$
$\frac {3}{5}÷3÷\frac {2}{15}$ $\frac {6}{5}×\frac {2}{3}÷\frac {12}{35}$ $\frac {7}{5}÷16÷\frac {14}{5}$
$\frac {5}{8}÷10×\frac {14}{15}$ $\frac {5}{3}×\frac {27}{2}÷25$ $\frac {1}{6}÷\frac {1}{3}÷\frac {1}{2}$
$\frac {15}{7}÷\frac {7}{9}÷\frac {5}{14}$ $\frac {6}{7}×\frac {5}{7}÷\frac {3}{2}$ $12÷\frac {3}{8}×\frac {5}{2}$
$\frac {16}{5}×\frac {3}{8}×15$ $\frac {25}{9}÷\frac {5}{4}÷\frac {4}{5}$ $\frac {5}{8}÷\frac {7}{40}×\frac {7}{20}$
$12÷\frac {2}{5}×\frac {8}{25}$ $\frac {9}{8}×\frac {10}{3}×\frac {1}{9}$ $\frac {3}{7}÷\frac {5}{7}×\frac {3}{2}$
$\frac {3}{5}÷3÷\frac {2}{15}$ $\frac {6}{5}×\frac {2}{3}÷\frac {12}{35}$ $\frac {7}{5}÷16÷\frac {14}{5}$
答案
二、$\frac{7}{120}$ $\frac{9}{10}$ 1 $\frac{54}{7}$ $\frac{20}{49}$ 80 18 $\frac{25}{9}$ $\frac{5}{4}$ $\frac{48}{5}$ $\frac{5}{12}$ $\frac{9}{10}$ $\frac{3}{2}$ $\frac{7}{3}$ $\frac{1}{32}$
解析
$\frac{5}{8}÷10×\frac{14}{15}$
$=\frac{5}{8}×\frac{1}{10}×\frac{14}{15}$
$=\frac{1}{16}×\frac{14}{15}$
$=\frac{7}{120}$
$\frac{5}{3}×\frac{27}{2}÷25$
$=\frac{45}{2}÷25$
$=\frac{45}{2}×\frac{1}{25}$
$=\frac{9}{10}$
$\frac{1}{6}÷\frac{1}{3}÷\frac{1}{2}$
$=\frac{1}{6}×3×2$
$=\frac{1}{2}×2$
$=1$
$\frac{15}{7}÷\frac{7}{9}÷\frac{5}{14}$
$=\frac{15}{7}×\frac{9}{7}×\frac{14}{5}$
$=\frac{135}{49}×\frac{14}{5}$
$=\frac{54}{7}$
$\frac{6}{7}×\frac{5}{7}÷\frac{3}{2}$
$=\frac{30}{49}÷\frac{3}{2}$
$=\frac{30}{49}×\frac{2}{3}$
$=\frac{20}{49}$
$12÷\frac{3}{8}×\frac{5}{2}$
$=12×\frac{8}{3}×\frac{5}{2}$
$=32×\frac{5}{2}$
$=80$
$\frac{16}{5}×\frac{3}{8}×15$
$=\frac{6}{5}×15$
$=18$
$\frac{25}{9}÷\frac{5}{4}÷\frac{4}{5}$
$=\frac{25}{9}×\frac{4}{5}×\frac{5}{4}$
$=\frac{25}{9}×1$
$=\frac{25}{9}$
$\frac{5}{8}÷\frac{7}{40}×\frac{7}{20}$
$=\frac{5}{8}×\frac{40}{7}×\frac{7}{20}$
$=\frac{25}{7}×\frac{7}{20}$
$=\frac{5}{4}$
$12÷\frac{2}{5}×\frac{8}{25}$
$=12×\frac{5}{2}×\frac{8}{25}$
$=30×\frac{8}{25}$
$=\frac{48}{5}$
$\frac{9}{8}×\frac{10}{3}×\frac{1}{9}$
$=\frac{15}{4}×\frac{1}{9}$
$=\frac{5}{12}$
$\frac{3}{7}÷\frac{5}{7}×\frac{3}{2}$
$=\frac{3}{7}×\frac{7}{5}×\frac{3}{2}$
$=\frac{3}{5}×\frac{3}{2}$
$=\frac{9}{10}$
$\frac{3}{5}÷3÷\frac{2}{15}$
$=\frac{3}{5}×\frac{1}{3}×\frac{15}{2}$
$=\frac{1}{5}×\frac{15}{2}$
$=\frac{3}{2}$
$\frac{6}{5}×\frac{2}{3}÷\frac{12}{35}$
$=\frac{4}{5}÷\frac{12}{35}$
$=\frac{4}{5}×\frac{35}{12}$
$=\frac{7}{3}$
$\frac{7}{5}÷16÷\frac{14}{5}$
$=\frac{7}{5}×\frac{1}{16}×\frac{5}{14}$
$=\frac{7}{80}×\frac{5}{14}$
$=\frac{1}{32}$
$=\frac{5}{8}×\frac{1}{10}×\frac{14}{15}$
$=\frac{1}{16}×\frac{14}{15}$
$=\frac{7}{120}$
$\frac{5}{3}×\frac{27}{2}÷25$
$=\frac{45}{2}÷25$
$=\frac{45}{2}×\frac{1}{25}$
$=\frac{9}{10}$
$\frac{1}{6}÷\frac{1}{3}÷\frac{1}{2}$
$=\frac{1}{6}×3×2$
$=\frac{1}{2}×2$
$=1$
$\frac{15}{7}÷\frac{7}{9}÷\frac{5}{14}$
$=\frac{15}{7}×\frac{9}{7}×\frac{14}{5}$
$=\frac{135}{49}×\frac{14}{5}$
$=\frac{54}{7}$
$\frac{6}{7}×\frac{5}{7}÷\frac{3}{2}$
$=\frac{30}{49}÷\frac{3}{2}$
$=\frac{30}{49}×\frac{2}{3}$
$=\frac{20}{49}$
$12÷\frac{3}{8}×\frac{5}{2}$
$=12×\frac{8}{3}×\frac{5}{2}$
$=32×\frac{5}{2}$
$=80$
$\frac{16}{5}×\frac{3}{8}×15$
$=\frac{6}{5}×15$
$=18$
$\frac{25}{9}÷\frac{5}{4}÷\frac{4}{5}$
$=\frac{25}{9}×\frac{4}{5}×\frac{5}{4}$
$=\frac{25}{9}×1$
$=\frac{25}{9}$
$\frac{5}{8}÷\frac{7}{40}×\frac{7}{20}$
$=\frac{5}{8}×\frac{40}{7}×\frac{7}{20}$
$=\frac{25}{7}×\frac{7}{20}$
$=\frac{5}{4}$
$12÷\frac{2}{5}×\frac{8}{25}$
$=12×\frac{5}{2}×\frac{8}{25}$
$=30×\frac{8}{25}$
$=\frac{48}{5}$
$\frac{9}{8}×\frac{10}{3}×\frac{1}{9}$
$=\frac{15}{4}×\frac{1}{9}$
$=\frac{5}{12}$
$\frac{3}{7}÷\frac{5}{7}×\frac{3}{2}$
$=\frac{3}{7}×\frac{7}{5}×\frac{3}{2}$
$=\frac{3}{5}×\frac{3}{2}$
$=\frac{9}{10}$
$\frac{3}{5}÷3÷\frac{2}{15}$
$=\frac{3}{5}×\frac{1}{3}×\frac{15}{2}$
$=\frac{1}{5}×\frac{15}{2}$
$=\frac{3}{2}$
$\frac{6}{5}×\frac{2}{3}÷\frac{12}{35}$
$=\frac{4}{5}÷\frac{12}{35}$
$=\frac{4}{5}×\frac{35}{12}$
$=\frac{7}{3}$
$\frac{7}{5}÷16÷\frac{14}{5}$
$=\frac{7}{5}×\frac{1}{16}×\frac{5}{14}$
$=\frac{7}{80}×\frac{5}{14}$
$=\frac{1}{32}$
