99.99×77.77+33.33x66.66 简便计算,麻烦写下过程

日期:2014-07-12 20:05:08 人气:1

99.99×77.77+33.33x66.66 简便计算,麻烦写下过程

11.11*9*7*11.11+11.11*3*11.11*6 =(63+18)*11.11*11.11 =81*11.11*11.11 =99.99*99.99 =(100-0.01)^2 =100^2+0.01^2-2*0.01*100 =10000+0.0001-2 =9998.0001
    A+
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