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2.34*11-107*0.22怎么简便啊?
人气:238 ℃ 时间:2020-04-18 17:42:55
解答
2.34*11-107*0.22 =2.34*11-10.7*22 =2.34*11-2.14*11 =11*(2.34-2.14) =11*0.2 =2.2
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