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12.5-3.25*1.8简便算法
人气:265 ℃ 时间:2020-04-13 07:37:24
解答
12.5-3.25*1.8
=12.5-12.5*0.26*1.8
=12.5(1-0.468)
=12.5*0.532
=12.5*8*0.0665
=100*0.0665
=6.65
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