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2/1.25-1.25/2简算
人气:335 ℃ 时间:2020-03-25 18:17:21
解答
`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
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