99.99×77.77+33.33x66.66 简便计算,麻烦写下过程
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
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