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第15页

信息发布者：

1.2

$\frac{7}{12}$

1.8

$1\frac{2}{9}$

$\frac {4}{3}$

$\frac{2}{3}$

0.09

2.4

$\frac{5}{6}$

$ =\dfrac {5}{12}×\dfrac {1}{8}+\dfrac {1}{8}×\dfrac {7}{12}$

$ =\dfrac {1}{8}×(\dfrac {5}{12}+\dfrac {7}{12})$

$ =\dfrac {1}{8}×1$

$ =\dfrac {1}{8}$

$=\dfrac {3}{10}×\dfrac {5}{3}+\dfrac {3}{10}×\dfrac {1}{3}$

$ =\dfrac {3}{10}×(\dfrac {5}{3}+\dfrac {1}{3})$

$ =\dfrac {3}{10}×2$

$ =\dfrac {3}{5}$

$=\dfrac {1}{3}÷\dfrac {4}{15}×\dfrac {3}{5}$

$ =\dfrac {1}{3}×\dfrac {15}{4}×\dfrac {3}{5}$

$ =\dfrac {3}{4}$

$ =\dfrac {3}{4}÷\dfrac {3}{4}×8×8$

$ =1×64$

$ =64$

$ =0.4×0.7÷0.4$

$ =0.4÷0.4×0.7$

$ =1×0.7$

$ =0.7$

$ =25.2×0.5+0.8$

$ =12.6+0.8$

$ =13.4$