1,99?2828怎么简便计算?简便计算过程方法如下解:99×28+28=(99+1)×28=100×28=28002,26?28?(1/26?27+1/27?28)简便计算原式=26x28x1/26x27+26x28x1/27x28=27x28+26x28x1/27x27+26x28x1/27=28x(27+26+26/27)=28x(50+3+26/27)=28x50+28x3+27x26/27+26/27=1400+84+26+26/27=1510又26/27你真好看3,汽车耗油10.9L/100k