0.999×0.6+0.111×3.6等于多少?

题目

0.999×0.6+0.111×3.6等于多少?

答案

0.999×0.6+0.111×3.6=0.999x0.6+0.999x0.4=0.999x﹙0.6+0.4﹚=0.999x1=0.999
注3.6=9x0.4,0.111x3.6=0.111x9x0.4=0.999x0.4