分析:(1)把2012看作2011+1,運(yùn)用乘法分配律簡(jiǎn)算;
(2)根據(jù)數(shù)字特點(diǎn),把原式變?yōu)?.25×78+0.5×1.25-7.3×1.25,運(yùn)用乘法分配律簡(jiǎn)算;
(3)調(diào)整運(yùn)算順序,即(56÷7)×(165÷11),計(jì)算即可;
(4)運(yùn)用乘法分配律簡(jiǎn)算.
解答:解:(1)2012×
,
=(2011+1)×
,
=2010+
,
=2010
;
(2)
×78+0.5×1.25-730÷80
=1.25×78+0.5×1.25-73÷8,
=1.25×78+0.5×1.25-7.3×1.25,
=1.25×(7.8+0.5-7.3),
=1.25;
(3)56÷11×165÷7,
=(56÷7)×(165÷11),
=8×15,
=120;
(4)(
-
)×28+4
×7-3
×7,
=
×28-
×28+4
×7-3
×7,
=7-4+(4
-3
)×7,
=3+7,
=10.
點(diǎn)評(píng):此題考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算,四則混合運(yùn)算,注意分析式中數(shù)據(jù),靈活運(yùn)用所學(xué)的運(yùn)算定律簡(jiǎn)便計(jì)算.