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0.75×38+75%×60简算
人气:280 ℃ 时间:2020-04-16 07:48:46
解答
0.75×38+75%×60
=0.75×38+0.75×60
=0.75×(38+60)
=0.75×(100-2)
=0.75×100-0.75×2
=75-1.5
=13.5
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