99.9+999×9.9(巧算) =
问题描述:
99.9+999×9.9(巧算) =
答
99.9+999x9.9=99.9x(9.9+0.1)=99.9x10=999这是错误答案-_-||99.9+999x9.9=999x0.1+999x9.9=999x(9.9+0.1)=999x10=9990这个对谢谢了!
99.9+999×9.9(巧算) =
99.9+999x9.9=99.9x(9.9+0.1)=99.9x10=999这是错误答案-_-||99.9+999x9.9=999x0.1+999x9.9=999x(9.9+0.1)=999x10=9990这个对谢谢了!