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数学
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简便计算:39*0.12-1.3*3.6
人气:219 ℃ 时间:2020-06-04 01:38:51
解答
39*0.12-1.3*3.6
=30*1.3*0.12-1.3*3.6
=1.3*(30*0.12)-1.3*3.6
=1.3*3.6-1.3*3.6
=0
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