简便运算:9.99×66.6+111×0.334×9=

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简便运算:9.99×66.6+111×0.334×9=简便运算:9.99×66.6+111×0.334×9=简便运算:9.99×66.6+111×0.334×9=原式=9.99×66.6+999×0.

简便运算:9.99×66.6+111×0.334×9=
简便运算:9.99×66.6+111×0.334×9=

简便运算:9.99×66.6+111×0.334×9=
原式
=9.99×66.6+999×0.334
=999×0.666+999×0.334
=999×(0.666+0.334)
=999×1
=999