电子课本网 第107页

第107页

信息发布者:
$解:原式​=-\frac {4}{5}\sqrt {5÷\frac {9}{5}}​$
$​ =-\frac {4}{5}×\frac {5}{3}​$
$​ =-\frac {4}{3}​$
$解:原式​=\sqrt {\frac {10}{3}÷\frac {3}{2}}​$
$​ =\sqrt {\frac {20}{9}}​$
$​ =\frac {2\sqrt {5}}{3}$
$​-\sqrt {1-a}​$
解:原式
$​=\sqrt {\frac {9}{12}÷\frac {54}{12}÷6}​$
$​ =\sqrt {\frac {1}{36}}​$
$​=\frac {1}{6}​$
$解:原式​=\frac {2\sqrt {3}}{3}​$
$解:原式​=-\frac {4}{5}\sqrt {5÷\frac {9}{5}}​$
$​ =-\frac {4}{5}×\frac {5}{3}​$
$​ =-\frac {4}{3}​$
$解:原式​=\frac {\sqrt {120}}{24}​$
$​ =\frac {\sqrt {30}}{12}​$
$​-\sqrt {1-a}​$
$解:原式​=\frac {\sqrt {ab}}{a}​$
$解:原式​=\frac {2\sqrt {3}}{3}​$
$解:原式​=-\frac {4}{3}÷\frac {2}{3}\sqrt {18÷8÷54}​$
$​ =-2\sqrt {\frac {1}{24}}​$
$​ =-\frac {2}{\sqrt {24}}​$
$​ =-\frac {\sqrt {6}}{6}$
$解:原式​=\frac {\sqrt {120}}{24}​$
$​ =\frac {\sqrt {30}}{12}​$
$解:原式​=-\frac {15}{8}\sqrt {\frac {64}{27}÷\frac {25}{8}}​$
$​ =-\frac {15}{8}×\sqrt {\frac {64×8}{27×25}}​$
$​ =-\frac {15}{8}×\frac {16\sqrt {2}}{15\sqrt {3}}​$
$​ =-\frac {2\sqrt {6}}{3}​$
$解:原式​=\frac {\sqrt {ab}}{a}​$
$解:原式​=-\frac {4}{3}÷\frac {2}{3}\sqrt {18÷8÷54}​$
$​ =-2\sqrt {\frac {1}{24}}​$
$​ =-\frac {2}{\sqrt {24}}​$
$​ =-\frac {\sqrt {6}}{6}$
$解:原式​=-\frac {15}{8}\sqrt {\frac {64}{27}÷\frac {25}{8}}​$
$​ =-\frac {15}{8}×\sqrt {\frac {64×8}{27×25}}​$
$​ =-\frac {15}{8}×\frac {16\sqrt {2}}{15\sqrt {3}}​$
$​ =-\frac {2\sqrt {6}}{3}​$