解:(1)

÷(1-

)×

,
=

÷

×

,
=

×

×

,
=

;
(2)

×

+

÷

,
=

×

+

×

,
=

×(

+

),
=

×1,
=

;
(3)(

-

)÷

,
=(

-

)×8,
=

×8-

×8,
=

-

,
=

;
(4)13-13×

,
=13×(1-

),
=13×

,
=

;
(5)(

+

)×

+

,
=

×

+

×

+

,
=

+

+

,
=

+(

+

),
=

+1,
=1

;
(6)[

-(

-

)]×

,
=[

-

]×

,
=

×

,
=

.
分析:(1)先算括號(hào)內(nèi)的,再算括號(hào)外的除法和乘法;
(2)(3)把除法改為乘法,運(yùn)用乘法分配律簡(jiǎn)算;
(4)運(yùn)用乘法分配律簡(jiǎn)算;
(5)運(yùn)用乘法分配律計(jì)算(

+

)×

,原式變?yōu)?img class='latex' src='http://thumb.zyjl.cn/pic5/latex/110760.png' />+

+

,運(yùn)用加法結(jié)合律簡(jiǎn)算;
(6)先算小括號(hào)內(nèi)的,再算中括號(hào)內(nèi)的,最后算括號(hào)外的.
點(diǎn)評(píng):此題考查了分?jǐn)?shù)的四則混合運(yùn)算,注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算律簡(jiǎn)便計(jì)算.