第109页

信息发布者:
$26\times\frac{5}{39}$
$=\frac{2\times5}{3}$
$=\frac{10}{3}$
$\frac{24}{35}\times\frac{21}{20}$
$=\frac{6\times3}{5\times5}$
$=\frac{18}{25}$
$\frac{15}{16}\times\frac{4}{3}\times\frac{8}{5}$
$=\frac{5}{4}\times\frac{8}{5}$
$=2$
$9\div\frac{6}{13}\times\frac{4}{39}$
$=9\times\frac{13}{6}\times\frac{4}{39}$
$=9\times(\frac{13}{6}\times\frac{4}{39})$
$=9\times\frac{2}{9}$
$=2$
$\frac{3}{5}\div6\times\frac{10}{9}$
$=\frac{3}{5}\times\frac{1}{6}\times\frac{10}{9}$
$=\frac{1}{10}\times\frac{10}{9}$
$=\frac{1}{9}$
$\frac{7}{8}\div\frac{21}{25}\div\frac{5}{16}$
$=\frac{7}{8}\times\frac{25}{21}\times\frac{16}{5}$
$=\frac{25}{24}\times\frac{16}{5}$
$=\frac{10}{3}$
$ =(\frac 45+\frac {11}5)×\frac 7{12}$
$ =3×\frac 7{12}$
$ =\frac 74$
$ =(21+\frac 7{12})×\frac 37$
$ =21×\frac 37+\frac 7{12}×\frac 37$
$ =9+\frac 14$
$ =9\frac 14$
$ =\frac {32}{33}×(33+1)$
$ =\frac {32}{33}×33+\frac {32}{33}$
$ =32+\frac {32}{33}$
$ =32\frac {32}{33}$
$ =[1-\frac 7{20}]×\frac {25}{26}$​ ​$ =\frac {13}{20}×\frac {25}{26}$​ ​$ =\frac 58$