201×24         95×32+32+4×32       
125×5×8×6 125×32       
282+53+37+18            99×38+38
540÷36         5400-1856-144          
25×32×125.
分析:①201×24,運(yùn)用乘法分配律進(jìn)行簡(jiǎn)算;
②95×32+32+4×32,運(yùn)用乘法分配律進(jìn)行簡(jiǎn)算;
③125×5×8×6,運(yùn)用乘法交換律和結(jié)合律進(jìn)行簡(jiǎn)算;
④125×32,把32 拆分為;8×4,運(yùn)用乘法結(jié)合律進(jìn)行簡(jiǎn)算;
⑤282+53+37+18,運(yùn)用加法交換律和結(jié)合律進(jìn)行簡(jiǎn)算;
⑥99×38+38,運(yùn)用乘法分配律進(jìn)行簡(jiǎn)算;
⑦540÷36,根據(jù)除法的運(yùn)算性質(zhì)進(jìn)行簡(jiǎn)算;
⑧5400-1856-144,根據(jù)減法的運(yùn)算性質(zhì)進(jìn)行簡(jiǎn)算;
⑨25×32×125,把把32 拆分為;4×8,運(yùn)用乘法結(jié)合律進(jìn)行簡(jiǎn)算;
解答:解:①201×24,
=200×24+1×24,
=2400+24,
=2424;

②95×32+32+4×32,
=(95+4+1)×32,
=100×32,
=3200;

③125×5×8×6,
=(125×8)×(5×6),
=1000×30,
=30000;

④125×32,
=125×8×4,
=1000×4,
=4000;

⑤282+53+37+18,
=(282+18)+(53+37),
=300+90,
=390;

⑥99×38+38,
=(99+1)×38,
=100×38,
=3800;

⑦540÷36,
=540÷9÷4,
=60÷4,
=15;

⑧5400-1856-144,
=5400-(1856+144),
=5400-2000,
=3400;

⑨25×32×125,
=(25×4)×(8×125),
=100×1000,
=100000.
點(diǎn)評(píng):此題考查的目的是理解掌握加法、乘法的運(yùn)算定律和減法、乘法的運(yùn)算性質(zhì),并且能夠靈活運(yùn)用這些運(yùn)算定律和運(yùn)算性質(zhì)進(jìn)行簡(jiǎn)便計(jì)算.
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