99.99×77.78+33.33×66.66,能不能简便算吗?怎么算
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
99.99X77.78+33.33X66.6
=99.99X77.78+33.33X3X22.22
=99.99X77.78+99.99X22.22
=99.99X(77.78+22.22)
=99.99X100
=9999
99.99×77.78+33.33×66.66,能不能简便算吗?怎么算