2/1.25-1.25/2简算
问题描述：
2/1.25-1.25/2简算
答
`2/1.25-1.25/2=(2×2-1.25×1.25)/(2×1.25) =4/2.5-1.25×1.25/(5×0.5) =1.6-0.5×1.25 =1.6-0.625 =0.975
2/1.25-1.25/2简算
`2/1.25-1.25/2=(2×2-1.25×1.25)/(2×1.25) =4/2.5-1.25×1.25/(5×0.5) =1.6-0.5×1.25 =1.6-0.625 =0.975