问题描述: 3比8和15比4 12.5比40和25比60 0.3比2分之1和24比40 0.2比10分之3和3.2:4.8 那几个能组成比例? 1个回答 分类:数学 2014-10-02 问题解答: 我来补答 3 :8 = 3 :815 :4 = 15 :412.5 :40 = 125 :400 = 25 :80 = 5 :1625 :60 = 5 :120.3 :1 / 2 = 0.3 :0.5 = 3 :524 :40 = 3 :80.2 :3 / 10 = 0.2 :0.3 = 2 :33.2 :4.8 = 32 :48 = 16 :24 = 8 :12 = 4 :6 = 2 :3结论:3 :8 和 24 :40 的比例相等,都等于 3 :80.2 :3 / 10 和 3.2 :4.8 的比例相等,都等于 2 :33 :8 = 0.37515 :4 = 3.7512.5 :40 = 0.312525 :60 = 0.416.( 6 循环)0.3 :1 / 2 = 0.624 :40 = 0.3750.2 :3 / 10 = 0.6.( 6 循环)3.2 :4.8 = 0.6.( 6 循环) 展开全文阅读