解:(1)1.72+6.03+8.97+2.28,
=(1.72+2.28)+(6.03+8.97),
=4+15,
=19;
(2)25×48×125,
=(25×6)×(8×125),
=150×1000,
=150000;
(3)72.27-7.44-2.56,
=72.27-(7.44+2.56),
=72.27-10,
=62.27;
(4)(64-224÷14)×12,
=(64-16)×12,
=48×12,
=576;
(5)85×101,
=85×100+85×1,
=8500+85,
=8585;
(6)787×101-787,
=787×(101-1),
=787×100,
=78700.
分析:(1)1.72+6.03+8.97+2.28,運(yùn)用加法交換律、結(jié)合律進(jìn)行簡(jiǎn)算;
(2)25×48×125,把48分解為6×8,再運(yùn)用乘法結(jié)合律進(jìn)行簡(jiǎn)算;
(3)72.27-7.44-2.56,根據(jù)減法的運(yùn)算性質(zhì)進(jìn)行簡(jiǎn)算;
(4)(64-224÷14)×12,根據(jù)整數(shù)四則混合運(yùn)算的順序,按照整數(shù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算;
(5)85×101,運(yùn)用乘法分配律進(jìn)行簡(jiǎn)算;
(6)787×101-787,運(yùn)用乘法分配律進(jìn)行簡(jiǎn)算.
點(diǎn)評(píng):此題考查的目的是掌握整數(shù)、小數(shù)四則混合運(yùn)算的順序以及它們的計(jì)算法則,并且能夠靈活運(yùn)用簡(jiǎn)便方法進(jìn)行計(jì)算.