第31页 - 亮点给力提优课时作业本六年级数学江苏版

$\frac{2}{3}$

0

40

$27\frac{5}{7}$

$\frac{3}{8}$

15

$\frac{1}{4}$

$8\frac{8}{9}$

$=\frac{3}{7}×\frac {4}{11}+\frac {3}{7}×\frac {7}{11}$

$=\frac {3}{7}×(\frac {4}{11}+\frac {7}{11})$

$=\frac {3}{7}×1$

$=\frac{3}{7}$

$=\frac {1}{17}+\frac {5}{8}×5+\frac {2}{17}×8$

$=\frac {1}{17}+\frac {16}{17}+5$

$=1+5$

$=6$

$=2-\frac {6}{13}×\frac {26}{9}-\frac {2}{3}$

$=2-\frac {4}{3}-\frac {2}{3}$

$=2-(\frac {4}{3}+\frac {2}{3})$

$=2-2$

$=0$

$=\frac {1}{9}×36-\frac {1}{12}×36$

$=4-3$

$=1$

$=\frac {8}{11}×(\frac {9}{5}-\frac {4}{5}-\frac {6}{17})$

$=\frac {8}{11}×(1-\frac {6}{17})$

$=\frac {8}{11}×\frac {11}{17}$

$=\frac{8}{17}$

$=24×\frac{7}{3}+24×\frac{7}{4}$

$=56+42$

$=98$

$解:\frac{1}{6}x=25$

$x=25×6$

$x=150$

$解:\frac{2}{5}x=\frac {5}{8}-\frac {1}{4}$

$\frac {2}{5}x=\frac {3}{8}$

$x=\frac {3}{8}×\frac {5}{2}$

$x=\frac{15}{16}$

$解:\frac {5}{7}x=\frac {7}{8}×\frac {5}{14}$

$\frac {5}{7}x=\frac {5}{16}$

$x=\frac {5}{16}×\frac {7}{5}$

$x=\frac{7}{16}$

18

140

$11\frac{1}{5}$

40

81

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