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(125乘99加125)乘16这道题怎么做?简便运算

你好!简便算法是: (125X99+125)X16 =[125X(99+1))]X16 =[125X100]X16 =12500X16 =200000

99乘125的简便算法 99*125 =100*125-125 =12500-125 =12375

简便计算(125x99十125)x16 =125x8x2x(99+1) =2000x100 =200000

=50×125×2×8 =(50×2)×(125×8) =100×1000 =100000

=125×(37×8×2) =(125×8)×(37×2) =1000×74 =74000

(125+9)x8 =(125+10-1)x8 =125x8+10x8-8 =1000+80-8 =1072

72×125 =(9×8)×125【把72分成它的两个因数:8和9;】 =9×(8×125)【运用乘法结合律】 =9×1000 =9000

25×64×125=(25×8)×(125×8)=200×1000=200000

125*8

24×25×125 =(3×8)×25×125 =(3×25)×(8×125) =75×1000 =75000

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