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2.25*1.8+1.25*0.8简便计算
人气:210 ℃ 时间:2020-01-29 06:33:20
解答
2.25*1.8+1.25*0.8
=2.25*(0.8+1)+1.25*0.8
=2.25*0.8+2.25*1+1.25*0.8
=1.8+2.25+1
=5.05
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