9.99×66.6+111×0.334×9的简便计算怎么做?

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9.99×66.6+111×0.334×9的简便计算怎么做?9.99×66.6+111×0.334×9的简便计算怎么做?9.99×66.6+111×0.334×9的简便计算怎么做?9.99×66.6+

9.99×66.6+111×0.334×9的简便计算怎么做?
9.99×66.6+111×0.334×9的简便计算怎么做?

9.99×66.6+111×0.334×9的简便计算怎么做?
9.99×66.6+111×0.334×9
=999×0.01×66.6+0.334×111×9
=999×0.666+0.334×999
=999×(0.666+0.334)
=999×1
=999

9.99×66.6+1.11×33.4×9=9.99×100=999

先乘除后加减!!!