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23.24/2.8-7.5*0.8 怎么简算
人气:381 ℃ 时间:2020-03-21 22:32:11
解答
23.24/2.8-7.5*0.8
=23.24/4/0.7-2.5*3*4*0.2
=5.81/0.7-(2.5*4)*(3*0.2)
=8.3-10*0.6
=8.3-6
=2.3
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