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