計(jì)算下列各題,能簡(jiǎn)算的要簡(jiǎn)算.
153×43﹢43×47;
101×16;
35×(21﹢480÷32);
〔368-(132+129)〕×34;
125×5×8×2;
(736÷16﹢27)×5.
解:(1)153×43﹢43×47,
=(153+47)×43,
=200×43,
=8600;
(2)101×16,
=(100+1)×16,
=100×16+16,
=1600+16,
=1616;
(3)35×(21﹢480÷32),
=35×(21+15),
=35×36,
=1260;
(4)〔368-(132+129)〕×34,
=[368-261]×34,
=107×34,
=(100+7)×34,
=100×7+7×34,
=700+238,
=938;
(5)125×5×8×2,
=125×8×(5×2),
=1000×10,
=10000;
(6)(736÷16﹢27)×5,
=(46+27)×5,
=365.
分析:(1)根據(jù)乘法分配律的逆運(yùn)算簡(jiǎn)算;
(2)把101看作(100+1),然后用乘法分配律簡(jiǎn)算;
(3)按運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)內(nèi)的,再算括號(hào)外的;
(4)按運(yùn)算順序進(jìn)行計(jì)算,先算小括號(hào)內(nèi)的,再算中括號(hào)內(nèi)的,最后算括號(hào)外的;
(5)運(yùn)用乘法交換律和結(jié)合律簡(jiǎn)算;
(6)按運(yùn)算順序進(jìn)行計(jì)算,先算括號(hào)內(nèi)的,再算括號(hào)外的.
點(diǎn)評(píng):此題考查學(xué)生對(duì)四則運(yùn)算順序的掌握情況,以及運(yùn)用運(yùn)算定律簡(jiǎn)算的能力.