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99.75-4.25乘1.2.怎么简算
人气:406 ℃ 时间:2020-04-28 06:51:22
解答
99.75-4.25×1.2=99.75-4.25×(1+0.2)=99.75-4.25×1-4.25×0.2=94.65
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