解:(1)25×103-125×3,
=25×(100+3)-125×3,
=25×100+25×3-125×3,
=2500+75-375,
=2575-375,
=2200.
(2)2700-425-175,
=2700-(425+175),
=2700-600,
=2100;
(3)1200÷25÷4,
=1200÷(25×4),
=1200÷100,
=12;
(4)41+127+59+173,
=(41+59)+(127+173),
=100+300,
=400;
(5)156×83+156×17,
=156×(83+17),
=156×100,
=15600;
(6)25×73×4,
=25×4×73,
=100×73,
=7300.
分析:(1)先把103分解成100+3,再運(yùn)用乘法分配律簡(jiǎn)算;
(2)根據(jù)減法的性質(zhì)簡(jiǎn)算;
(3)根據(jù)除法的性質(zhì)簡(jiǎn)算;
(4)運(yùn)用加法交換了和結(jié)合律簡(jiǎn)算;
(5)運(yùn)用乘法分配律簡(jiǎn)算;
(6)運(yùn)用乘法結(jié)合律簡(jiǎn)算.
點(diǎn)評(píng):此題考查了四則混合運(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(jiǎn)便計(jì)算.