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简便计算(125x99十125)x16

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

(125X99十125)X16 =125X(99十1)X16 =125X100X16 =(125X8)X(100X2) =1000X200 =200000

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

25+25x99可以看作25x(99+1)=2500 2500x16=50000

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