分析:(1)運(yùn)用加法交換律簡(jiǎn)算;
(2)運(yùn)用加法交換律和結(jié)合律簡(jiǎn)算;
(3)運(yùn)用乘法交換律簡(jiǎn)算;
(4)(6)運(yùn)用乘法分配律簡(jiǎn)算;
(5)先把101分解成100+1,再運(yùn)用乘法分配律簡(jiǎn)算.
解答:解:(1)357+288+143,
=357+143+288,
=500+288,
=788;
(2)129+253+171+47,
=(129+171)+(253+47),
=300+300,
=600;
(3)25×35×4,
=25×4×35,
=100×35,
=3500;
(4)8×( 125+6 ),
=8×125+8×6,
=1000+48,
=1048;
(5)38×101,
=38×(100+1),
=38×100+38×1,
=3800+38,
=3838;
(6)35×34+65×34,
=(35+65)×34,
=100×34,
=3400.
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.