2.61*39.5+0.318*261+2.87*26.1
=2.61*39.5+2.61*31.8+2.61*28.7
=2.61(39.5+31.8+28.7)
=2.61*100
=261
2.61*39.5+0.318*261+2.87*26.1 简便计算
2.61*39.5+0.318*261+2.87*26.1 简便计算
数学人气:191 ℃时间:2020-03-29 09:40:09
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