解:
(1)

×4×

,
=

×(4×

),
=

×3,
=

;
(2)

×7+

,
=

×(7+1),
=

×8,
=3;
(3)55×

-32×

,
=30-8,
=22;
(4)0.125×32×2.5,
=0.125×(4×8)×2.5,
=(0.125×8)×(4×2.5),
=1×10,
=10;
(5)99.9+0.12+0.1+0.88,
=(99.9+0.1)+(0.12+0.88),
=100+1,
=101;
(6)9+99+999+9×

,
=9+99+999+3,
=9+99+999+(1+1+1),
=(9+1)+(99+1)+(999+1),
=10+100+1000,
=1110.
分析:(1)根據(jù)乘法結(jié)合律進(jìn)行計(jì)算;
(2)根據(jù)乘法分配律進(jìn)行計(jì)算;
(3)先算乘法,再算減法;
(4)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(5)根據(jù)加法交換律和結(jié)合律進(jìn)行計(jì)算;
(6)先算乘法,再根據(jù)加法交換律和結(jié)合律進(jìn)行計(jì)算.
點(diǎn)評(píng):考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算,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.