99.99×77.78+33.33×66.66,能不能简便算吗?怎么算?

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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?99.99×77.78+33.33×66.66,能不能简

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?

99.99×77.78+33.33×66.66,能不能简便算吗?怎么算?
原式=99.99×77.78+33.33×66.66 =99.99×77.78+99.99×22.22 =99.99×(77.78+22.22) =99.99×100 =9999