99x3.6x3.6简便计算

日期:2016-09-17 16:50:16 人气:1

99x3.6x3.6简便计算

  1283.04 解析:   99×3.6×3.6   =99×(4-0.4)²   =99×(16+0.16-3.2)   =99×12.96   =(100-1)×12.96   =1296-12.96   =1283.04
    A+
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