解:(1)105×32-3232÷32,
=3360-101,
=3159;
(2)125×3
×0.8×
,
=125×0.8×(
×
),
=100×1,
=100;
(3)(
-
)×63-
,
=
×63-
×63-
,
=9-7-
,
=2-
,
=1
;
(4)210.5×[(6.05-3.35)÷1.5],
=210.5×[(6.05-3.35)÷1.5],
=210.5×[2.7÷1.5],
=210.5×1.8,
=378.9;
(5)(
-
)×
÷
,
=(
-
)×
×2,
=
×
×2,
=
;
(6)0.75×16+
,
=0.75×16+0.75×5-0.75,
=(16+5-1)×0.75,
=20×0.75,
=15.
分析:(1)把32看作30+2,根據(jù)乘法分配律求出105×(30+2)=3150+210,同時(shí)計(jì)算出3232÷32=101,然后通過拆項(xiàng)和加法結(jié)合律簡(jiǎn)算;
(2)運(yùn)用乘法交換律和結(jié)合律簡(jiǎn)算;
(3)運(yùn)用乘法分配律計(jì)算(
-
)×63,然后與
相減即可;
(4)按運(yùn)算順序進(jìn)行計(jì)算,先算小括號(hào)內(nèi)的減法,再算中括號(hào)內(nèi)的除法,最后算括號(hào)外的乘法;
(5)把除法改為乘法,然后按運(yùn)算順序計(jì)算,此題應(yīng)注意約分;
(6)把分?jǐn)?shù)和百分?jǐn)?shù)化為小數(shù),用乘法分配的逆運(yùn)算簡(jiǎn)算.
點(diǎn)評(píng):此題考查了學(xué)生對(duì)四則混合運(yùn)算順序的掌握,以及運(yùn)用運(yùn)算定律簡(jiǎn)算的能力.