第1页 - 江苏版实验班提优训练数学六年级上下册答案

$=\frac{1}{4}×\frac{16}{3}-\frac{7}{9}$

$=\frac{4}{3}-\frac{7}{9}$

$=\frac{12}{9}-\frac{7}{9}$

$=\frac{5}{9}$

$=\frac {6}{7}×\frac {6}{5}+\frac {1}{7}×\frac {6}{5}$

$=\frac {6}{5}×(\frac {6}{7}+\frac {1}{7})$

$=\frac {6}{5}×1$

$=\frac{6}{5}$

$=\frac {1}{7}+\frac{1}{12}×2+\frac {5}{6}$

$=\frac {1}{7}+(\frac {1}{6}+\frac {5}{6})$

$=\frac {1}{7}+1$

$=1\frac{1}{7}$

$=3×\frac{7}{3}-\frac {3}{7}×\frac {1}{3}$

$=7-\frac {1}{7}$

$=6\frac{6}{7}$

$=\frac {7}{33}+\frac {3}{13}×13+\frac {2}{33}×13$

$=\frac {7}{33}+3+\frac {26}{33}$

$=3+(\frac {7}{33}+\frac {26}{33})$

$=3+1$

$=4$

$解:0.25x=4$

$x=4÷0.25$

$x=16$

$解:\frac{2}{3}x=\frac {5}{18}+\frac {1}{6}$

$\frac {2}{3}x=\frac {4}{9}$

$x=\frac {4}{9}×\frac {3}{2}$

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

28

30

75

8:5

80

20

$=\frac {5}{16}÷(\frac {5}{12}-\frac {7}{24})$

$=\frac {5}{16}÷\frac {1}{8}$

$=\frac {5}{16}×8$

$=\frac {5}{2}$