分析:(1)根據(jù)加法交換律和結(jié)合律簡(jiǎn)算;
(2)根據(jù)減法的性質(zhì)簡(jiǎn)算;
(3)先把102分解成100+2,再運(yùn)用乘法分配律簡(jiǎn)算;
(4)運(yùn)用乘法分配律簡(jiǎn)算;
(5)根據(jù)除法的性質(zhì)簡(jiǎn)算;
(6)運(yùn)用乘法交換律簡(jiǎn)算.
解答:解:(1)73+3.4+27+5.6,
=(73+27)+(3.4+5.6),
=100+9,
=109;
(2)7.25-3.42-1.58,
=7.25-(3.42+1.58),
=7.25-5,
=5.25;
(3)102×85,
=(100+2)×85,
=100×85+2×85,
=8500+170,
=8670;
(4)363×7+237×7,
=(363+237)×7,
=600×7,
=4200;
(5)4300÷25÷4,
=4300÷(25×4),
=4300÷100,
=43;
(6)88×125÷11,
=88÷11×125,
=8×125,
=1000.
點(diǎn)評(píng):此題是考查四則混合運(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(jiǎn)便計(jì)算.