简算:1.87×9.9-0.187=1.87x(10-0.1)-0.187=1.87x10-1.87x0.1-0.187=18.7-0.187-0.187=18.513-0.187=18.326
应该是+0.187吧1.87×9.9+0.187=1.87×9.9+1.87×0.1=1.87×(9.9+0.1)=1.87×10=18.7
:.:18,326