分析:(1)先算小括號(hào)里的乘法,再算小括號(hào)里的減法,最后算括號(hào)外的除法;
(2)運(yùn)用乘法的分配律進(jìn)行簡算;
(3)先算小括號(hào)里的加法,再算中括號(hào)里的減法,最后算括號(hào)外的乘法;
(4)先分別求出乘法算式和除法算式,再算減法;
(5)運(yùn)用乘法的交換律、結(jié)合律進(jìn)行簡算;
(6)把444化成111×4,再運(yùn)用乘法結(jié)合律進(jìn)行簡算;
(7)從左向右進(jìn)行計(jì)算即可;
(8)從左向右進(jìn)行計(jì)算即可.
解答:解:(1)412÷(607-36×14),
=412÷(607-504),
=412÷103,
=4;
(2)72×36+18×36,
=(72+18)×36,
=90×36,
=3240;
(3)80×[(325+7)-304],
=80×[332-304],
=80×28,
=2240;
(4)250×8-10000÷8,
=2000-1250,
=750;
(5)125×6×8,
=125×8×6,
=1000×6,
=6000;
(6)444×25,
=111×(4×25),
=111×100,
=11100;
(7)
+-,
=1-
,
=
;
(8)
+-,
=1-
,
=
.
點(diǎn)評(píng):此題考查四則混合運(yùn)算,要仔細(xì)觀察算式的特點(diǎn),靈活運(yùn)用一些定律進(jìn)行簡便計(jì)算.