题目内容

计算下列各题,能简算的要简算.
153×43﹢43×47;         
101×16;            
35×(21﹢480÷32);
〔368-(132+129)〕×34;      
125×5×8×2;       
(736÷16﹢27)×5.
分析:(1)根据乘法分配律的逆运算简算;
(2)把101看作(100+1),然后用乘法分配律简算;
(3)按运算顺序进行计算,先算括号内的,再算括号外的;
(4)按运算顺序进行计算,先算小括号内的,再算中括号内的,最后算括号外的;
(5)运用乘法交换律和结合律简算;
(6)按运算顺序进行计算,先算括号内的,再算括号外的.
解答: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.
点评:此题考查学生对四则运算顺序的掌握情况,以及运用运算定律简算的能力.
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