99.99×77.78+33.33×66.66,能不能简便算吗?怎么算

日期:2015-09-05 17:38:48 人气:1

99.99×77.78+33.33×66.66,能不能简便算吗?怎么算

99.99X77.78+33.33X66.6 =99.99X77.78+33.33X3X22.22 =99.99X77.78+99.99X22.22 =99.99X(77.78+22.22) =99.99X100 =9999
    A+
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